Na3Ba7Ti7Nb3O30 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic Pm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(3), one O(5), one O(6), two equivalent O(10), two equivalent O(16), two equivalent O(26), and two equivalent O(7) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Ba(1)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(4)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. In the second Na site, Na(2) is bonded to one O(28), one O(30), one O(5), one O(6), two equivalent O(20), two equivalent O(21), two equivalent O(23), and two equivalent O(25) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Na(3)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. In the third Na site, Na(3) is bonded to one O(28), one O(30), one O(5), one O(6), two equivalent O(13), two equivalent O(23), two equivalent O(25), and two equivalent O(26) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. There are seven inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(1), one O(3), one O(5), one O(6), two equivalent O(10), two equivalent O(21), two equivalent O(7), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Na(1)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(4)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. In the second Ba site, Ba(2) is bonded to one O(1), one O(2), one O(3), one O(4), two equivalent O(11), two equivalent O(14), two equivalent O(8), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, and faces with two equivalent Ti(4)O6 octahedra. In the third Ba site, Ba(3) is bonded to one O(2), one O(27), one O(29), one O(4), two equivalent O(11), two equivalent O(12), two equivalent O(15), and two equivalent O(18) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Ba(5)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ti(5)O6 octahedra, and faces with two equivalent Ti(7)O6 octahedra. In the fourth Ba site, Ba(4) is bonded to one O(1), one O(2), one O(3), one O(4), two equivalent O(14), two equivalent O(16), two equivalent O(17), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, and faces with two equivalent Ti(4)O6 octahedra. In the fifth Ba site, Ba(5) is bonded to one O(2), one O(27), one O(29), one O(4), two equivalent O(15), two equivalent O(17), two equivalent O(18), and two equivalent O(24) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ti(5)O6 octahedra, and faces with two equivalent Ti(7)O6 octahedra. In the sixth Ba site, Ba(6) is bonded to one O(27), one O(28), one O(29), one O(30), two equivalent O(12), two equivalent O(19), two equivalent O(20), and two equivalent O(22) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(7)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, faces with two equivalent Ba(7)O12 cuboctahedra, faces with two equivalent Ti(5)O6 octahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Ti(7)O6 octahedra, and faces with two equivalent Nb(1)O6 octahedra. In the seventh Ba site, Ba(7) is bonded to one O(27), one O(28), one O(29), one O(30), two equivalent O(13), two equivalent O(19), two equivalent O(22), and two equivalent O(24) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(6)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, faces with two equivalent Ba(7)O12 cuboctahedra, faces with two equivalent Ti(5)O6 octahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Ti(7)O6 octahedra, and faces with two equivalent Nb(1)O6 octahedra. There are seven inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(16), one O(7), one O(8), one O(9), and two equivalent O(1) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra, corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second Ti site, Ti(2) is bonded to one O(11), one O(14), one O(15), one O(17), and two equivalent O(4) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Ti(7)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with two equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the third Ti site, Ti(3) is bonded to one O(11), one O(17), one O(18), one O(8), and two equivalent O(2) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(5)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with two equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fourth Ti site, Ti(4) is bonded to one O(10), one O(14), one O(16), one O(9), and two equivalent O(3) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fifth Ti site, Ti(5) is bonded to one O(12), one O(18), one O(19), one O(24), and two equivalent O(27) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Ti(6)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra, corners with two equivalent Ti(7)O6 octahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the sixth Ti site, Ti(6) is bonded to one O(13), one O(19), one O(20), one O(25), and two equivalent O(28) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(5)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra, corners with two equivalent Ti(6)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the seventh Ti site, Ti(7) is bonded to one O(12), one O(15), one O(22), one O(24), and two equivalent O(29) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra, corners with two equivalent Ti(7)O6 octahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(13), one O(20), one O(22), one O(23), and two equivalent O(30) atoms to form NbO6 octahedra that share  a cornercorner with one Ti(7)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Ti(6)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second Nb site, Nb(2) is bonded to one O(21), one O(25), one O(26), one O(7), and two equivalent O(5) atoms to form NbO6 octahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(6)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third Nb site, Nb(3) is bonded to one O(10), one O(21), one O(23), one O(26), and two equivalent O(6) atoms to form NbO6 octahedra that share  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are thirty inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Ba(1), one Ba(2), one Ba(4), and two equivalent Ti(1) atoms to form distorted OBa3NaTi2 octahedra that share corners with two equivalent O(1)Ba3NaTi2 octahedra, edges with two equivalent O(3)Ba3NaTi2 octahedra, faces with two equivalent O(8)Ba4Ti2 octahedra, and faces with two equivalent O(9)Ba4Ti2 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(2), one Ba(3), one Ba(4), one Ba(5), and two equivalent Ti(3) atoms. In the third O site, O(3) is bonded to one Na(1), one Ba(1), one Ba(2), one Ba(4), and two equivalent Ti(4) atoms to form distorted OBa3NaTi2 octahedra that share corners with two equivalent O(3)Ba3NaTi2 octahedra, corners with four equivalent O(8)Ba4Ti2 octahedra, edges with two equivalent O(1)Ba3NaTi2 octahedra, and faces with two equivalent O(9)Ba4Ti2 octahedra. The corner-sharing octahedral tilt angles range from 2-60°. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Ba(2), one Ba(3), one Ba(4), one Ba(5), and two equivalent Ti(2) atoms. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Na(1), one Na(2), one Na(3), one Ba(1), and two equivalent Nb(2) atoms. In the sixth O site, O(6) is bonded in a distorted linear geometry to one Na(1), one Na(2), one Na(3), one Ba(1), and two equivalent Nb(3) atoms. In the seventh O site, O(7) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Ba(1), one Ti(1), and one Nb(2) atom. In the eighth O site, O(8) is bonded to two equivalent Ba(2), two equivalent Ba(4), one Ti(1), and one Ti(3) atom to form distorted OBa4Ti2 octahedra that share corners with two equivalent O(9)Ba4Ti2 octahedra, corners with four equivalent O(3)Ba3NaTi2 octahedra, edges with two equivalent O(8)Ba4Ti2 octahedra,  a faceface with one O(9)Ba4Ti2 octahedra, and faces with two equivalent O(1)Ba3NaTi2 octahedra. The corner-sharing octahedral tilt angles range from 59-60°. In the ninth O site, O(9) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Ti(1), and one Ti(4) atom to form distorted OBa4Ti2 octahedra that share corners with two equivalent O(8)Ba4Ti2 octahedra, edges with two equivalent O(9)Ba4Ti2 octahedra,  a faceface with one O(8)Ba4Ti2 octahedra, faces with two equivalent O(1)Ba3NaTi2 octahedra, and faces with two equivalent O(3)Ba3NaTi2 octahedra. The corner-sharing octahedral tilt angles are 59°. In the tenth O site, O(10) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Ba(1), one Ti(4), and one Nb(3) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(3), one Ti(2), and one Ti(3) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(6), one Ti(5), and one Ti(7) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to two equivalent Na(3), two equivalent Ba(7), one Ti(6), and one Nb(1) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(4), one Ti(2), and one Ti(4) atom. In the fifteenth O site, O(15) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(5), one Ti(2), and one Ti(7) atom. In the sixteenth O site, O(16) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Ba(4), one Ti(1), and one Ti(4) atom. In the seventeenth O site, O(17) is bonded in a distorted linear geometry to two equivalent Ba(4), two equivalent Ba(5), one Ti(2), and one Ti(3) atom. In the eighteenth O site, O(18) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(5), one Ti(3), and one Ti(5) atom. In the nineteenth O site, O(19) is bonded to two equivalent Ba(6), two equivalent Ba(7), one Ti(5), and one Ti(6) atom to form distorted OBa4Ti2 octahedra that share corners with four equivalent O(22)Ba4TiNb octahedra, edges with two equivalent O(19)Ba4Ti2 octahedra, edges with two equivalent O(22)Ba4TiNb octahedra, and faces with two equivalent O(28)Ba2Na2Ti2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the twentieth O site, O(20) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Ba(6), one Ti(6), and one Nb(1) atom. In the twenty-first O site, O(21) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Ba(1), one Nb(2), and one Nb(3) atom. In the twenty-second O site, O(22) is bonded to two equivalent Ba(6), two equivalent Ba(7), one Ti(7), and one Nb(1) atom to form distorted OBa4TiNb octahedra that share corners with four equivalent O(28)Ba2Na2Ti2 octahedra, corners with four equivalent O(19)Ba4Ti2 octahedra, edges with two equivalent O(19)Ba4Ti2 octahedra, and edges with two equivalent O(22)Ba4TiNb octahedra. The corner-sharing octahedral tilt angles range from 1-61°. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Na(3), one Nb(1), and one Nb(3) atom. In the twenty-fourth O site, O(24) is bonded in a distorted linear geometry to two equivalent Ba(5), two equivalent Ba(7), one Ti(5), and one Ti(7) atom. In the twenty-fifth O site, O(25) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Na(3), one Ti(6), and one Nb(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Na(3), one Nb(2), and one Nb(3) atom. In the twenty-seventh O site, O(27) is bonded in a distorted linear geometry to one Ba(3), one Ba(5), one Ba(6), one Ba(7), and two equivalent Ti(5) atoms. In the twenty-eighth O site, O(28) is bonded to one Na(2), one Na(3), one Ba(6), one Ba(7), and two equivalent Ti(6) atoms to form distorted OBa2Na2Ti2 octahedra that share corners with two equivalent O(28)Ba2Na2Ti2 octahedra, corners with four equivalent O(22)Ba4TiNb octahedra, and faces with two equivalent O(19)Ba4Ti2 octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the twenty-ninth O site, O(29) is bonded in a distorted linear geometry to one Ba(3), one Ba(5), one Ba(6), one Ba(7), and two equivalent Ti(7) atoms. In the thirtieth O site, O(30) is bonded in a distorted linear geometry to one Na(2), one Na(3), one Ba(6), one Ba(7), and two equivalent Nb(1) atoms.
Na3Ba7Ti7Nb3O30 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic Pm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(3), one O(5), one O(6), two equivalent O(10), two equivalent O(16), two equivalent O(26), and two equivalent O(7) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Ba(1)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(4)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. The Na(1)-O(1) bond length is 2.77 Å. The Na(1)-O(3) bond length is 2.79 Å. The Na(1)-O(5) bond length is 2.89 Å. The Na(1)-O(6) bond length is 2.93 Å. Both Na(1)-O(10) bond lengths are 2.86 Å. Both Na(1)-O(16) bond lengths are 2.80 Å. Both Na(1)-O(26) bond lengths are 2.92 Å. Both Na(1)-O(7) bond lengths are 2.84 Å. In the second Na site, Na(2) is bonded to one O(28), one O(30), one O(5), one O(6), two equivalent O(20), two equivalent O(21), two equivalent O(23), and two equivalent O(25) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Na(3)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. The Na(2)-O(28) bond length is 2.78 Å. The Na(2)-O(30) bond length is 2.84 Å. The Na(2)-O(5) bond length is 2.84 Å. The Na(2)-O(6) bond length is 2.89 Å. Both Na(2)-O(20) bond lengths are 2.81 Å. Both Na(2)-O(21) bond lengths are 2.87 Å. Both Na(2)-O(23) bond lengths are 2.88 Å. Both Na(2)-O(25) bond lengths are 2.82 Å. In the third Na site, Na(3) is bonded to one O(28), one O(30), one O(5), one O(6), two equivalent O(13), two equivalent O(23), two equivalent O(25), and two equivalent O(26) atoms to form NaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Na(2)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. The Na(3)-O(28) bond length is 2.78 Å. The Na(3)-O(30) bond length is 2.84 Å. The Na(3)-O(5) bond length is 2.83 Å. The Na(3)-O(6) bond length is 2.89 Å. Both Na(3)-O(13) bond lengths are 2.81 Å. Both Na(3)-O(23) bond lengths are 2.88 Å. Both Na(3)-O(25) bond lengths are 2.81 Å. Both Na(3)-O(26) bond lengths are 2.86 Å. There are seven inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(1), one O(3), one O(5), one O(6), two equivalent O(10), two equivalent O(21), two equivalent O(7), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Na(1)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(4)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Nb(3)O6 octahedra. The Ba(1)-O(1) bond length is 2.78 Å. The Ba(1)-O(3) bond length is 2.80 Å. The Ba(1)-O(5) bond length is 2.91 Å. The Ba(1)-O(6) bond length is 2.95 Å. Both Ba(1)-O(10) bond lengths are 2.87 Å. Both Ba(1)-O(21) bond lengths are 2.92 Å. Both Ba(1)-O(7) bond lengths are 2.83 Å. Both Ba(1)-O(9) bond lengths are 2.77 Å. In the second Ba site, Ba(2) is bonded to one O(1), one O(2), one O(3), one O(4), two equivalent O(11), two equivalent O(14), two equivalent O(8), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, and faces with two equivalent Ti(4)O6 octahedra. The Ba(2)-O(1) bond length is 2.84 Å. The Ba(2)-O(2) bond length is 2.87 Å. The Ba(2)-O(3) bond length is 2.86 Å. The Ba(2)-O(4) bond length is 2.88 Å. Both Ba(2)-O(11) bond lengths are 2.87 Å. Both Ba(2)-O(14) bond lengths are 2.86 Å. Both Ba(2)-O(8) bond lengths are 2.85 Å. Both Ba(2)-O(9) bond lengths are 2.84 Å. In the third Ba site, Ba(3) is bonded to one O(2), one O(27), one O(29), one O(4), two equivalent O(11), two equivalent O(12), two equivalent O(15), and two equivalent O(18) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Ba(5)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ti(5)O6 octahedra, and faces with two equivalent Ti(7)O6 octahedra. The Ba(3)-O(2) bond length is 2.83 Å. The Ba(3)-O(27) bond length is 2.85 Å. The Ba(3)-O(29) bond length is 2.87 Å. The Ba(3)-O(4) bond length is 2.85 Å. Both Ba(3)-O(11) bond lengths are 2.84 Å. Both Ba(3)-O(12) bond lengths are 2.86 Å. Both Ba(3)-O(15) bond lengths are 2.86 Å. Both Ba(3)-O(18) bond lengths are 2.84 Å. In the fourth Ba site, Ba(4) is bonded to one O(1), one O(2), one O(3), one O(4), two equivalent O(14), two equivalent O(16), two equivalent O(17), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(1)O12 cuboctahedra, corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra,  a faceface with one Na(1)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, and faces with two equivalent Ti(4)O6 octahedra. The Ba(4)-O(1) bond length is 2.82 Å. The Ba(4)-O(2) bond length is 2.86 Å. The Ba(4)-O(3) bond length is 2.84 Å. The Ba(4)-O(4) bond length is 2.88 Å. Both Ba(4)-O(14) bond lengths are 2.85 Å. Both Ba(4)-O(16) bond lengths are 2.84 Å. Both Ba(4)-O(17) bond lengths are 2.87 Å. Both Ba(4)-O(8) bond lengths are 2.83 Å. In the fifth Ba site, Ba(5) is bonded to one O(2), one O(27), one O(29), one O(4), two equivalent O(15), two equivalent O(17), two equivalent O(18), and two equivalent O(24) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with two equivalent Ba(6)O12 cuboctahedra, corners with two equivalent Ba(7)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ti(2)O6 octahedra, faces with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ti(5)O6 octahedra, and faces with two equivalent Ti(7)O6 octahedra. The Ba(5)-O(2) bond length is 2.83 Å. The Ba(5)-O(27) bond length is 2.85 Å. The Ba(5)-O(29) bond length is 2.87 Å. The Ba(5)-O(4) bond length is 2.85 Å. Both Ba(5)-O(15) bond lengths are 2.86 Å. Both Ba(5)-O(17) bond lengths are 2.84 Å. Both Ba(5)-O(18) bond lengths are 2.84 Å. Both Ba(5)-O(24) bond lengths are 2.86 Å. In the sixth Ba site, Ba(6) is bonded to one O(27), one O(28), one O(29), one O(30), two equivalent O(12), two equivalent O(19), two equivalent O(20), and two equivalent O(22) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(7)O12 cuboctahedra,  a faceface with one Na(2)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, faces with two equivalent Ba(7)O12 cuboctahedra, faces with two equivalent Ti(5)O6 octahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Ti(7)O6 octahedra, and faces with two equivalent Nb(1)O6 octahedra. The Ba(6)-O(27) bond length is 2.81 Å. The Ba(6)-O(28) bond length is 2.84 Å. The Ba(6)-O(29) bond length is 2.87 Å. The Ba(6)-O(30) bond length is 2.90 Å. Both Ba(6)-O(12) bond lengths are 2.84 Å. Both Ba(6)-O(19) bond lengths are 2.82 Å. Both Ba(6)-O(20) bond lengths are 2.87 Å. Both Ba(6)-O(22) bond lengths are 2.88 Å. In the seventh Ba site, Ba(7) is bonded to one O(27), one O(28), one O(29), one O(30), two equivalent O(13), two equivalent O(19), two equivalent O(22), and two equivalent O(24) atoms to form BaO12 cuboctahedra that share corners with two equivalent Na(2)O12 cuboctahedra, corners with two equivalent Na(3)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with two equivalent Ba(5)O12 cuboctahedra, corners with four equivalent Ba(6)O12 cuboctahedra,  a faceface with one Na(3)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, faces with two equivalent Ba(7)O12 cuboctahedra, faces with two equivalent Ti(5)O6 octahedra, faces with two equivalent Ti(6)O6 octahedra, faces with two equivalent Ti(7)O6 octahedra, and faces with two equivalent Nb(1)O6 octahedra. The Ba(7)-O(27) bond length is 2.82 Å. The Ba(7)-O(28) bond length is 2.84 Å. The Ba(7)-O(29) bond length is 2.87 Å. The Ba(7)-O(30) bond length is 2.90 Å. Both Ba(7)-O(13) bond lengths are 2.87 Å. Both Ba(7)-O(19) bond lengths are 2.82 Å. Both Ba(7)-O(22) bond lengths are 2.88 Å. Both Ba(7)-O(24) bond lengths are 2.84 Å. There are seven inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(16), one O(7), one O(8), one O(9), and two equivalent O(1) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra, corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. The Ti(1)-O(16) bond length is 1.96 Å. The Ti(1)-O(7) bond length is 1.97 Å. The Ti(1)-O(8) bond length is 2.08 Å. The Ti(1)-O(9) bond length is 2.08 Å. Both Ti(1)-O(1) bond lengths are 2.02 Å. In the second Ti site, Ti(2) is bonded to one O(11), one O(14), one O(15), one O(17), and two equivalent O(4) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Ti(7)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with two equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Ti(2)-O(11) bond length is 2.01 Å. The Ti(2)-O(14) bond length is 1.99 Å. The Ti(2)-O(15) bond length is 2.06 Å. The Ti(2)-O(17) bond length is 2.00 Å. Both Ti(2)-O(4) bond lengths are 2.01 Å. In the third Ti site, Ti(3) is bonded to one O(11), one O(17), one O(18), one O(8), and two equivalent O(2) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(5)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with two equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Ti(3)-O(11) bond length is 2.02 Å. The Ti(3)-O(17) bond length is 2.02 Å. The Ti(3)-O(18) bond length is 2.05 Å. The Ti(3)-O(8) bond length is 1.98 Å. Both Ti(3)-O(2) bond lengths are 2.01 Å. In the fourth Ti site, Ti(4) is bonded to one O(10), one O(14), one O(16), one O(9), and two equivalent O(3) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Ti(4)-O(10) bond length is 2.04 Å. The Ti(4)-O(14) bond length is 2.01 Å. The Ti(4)-O(16) bond length is 1.96 Å. The Ti(4)-O(9) bond length is 2.06 Å. Both Ti(4)-O(3) bond lengths are 2.01 Å. In the fifth Ti site, Ti(5) is bonded to one O(12), one O(18), one O(19), one O(24), and two equivalent O(27) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Ti(6)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra, corners with two equivalent Ti(7)O6 octahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. The Ti(5)-O(12) bond length is 2.02 Å. The Ti(5)-O(18) bond length is 2.01 Å. The Ti(5)-O(19) bond length is 2.01 Å. The Ti(5)-O(24) bond length is 2.02 Å. Both Ti(5)-O(27) bond lengths are 2.01 Å. In the sixth Ti site, Ti(6) is bonded to one O(13), one O(19), one O(20), one O(25), and two equivalent O(28) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(5)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra, corners with two equivalent Ti(6)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. The Ti(6)-O(13) bond length is 2.01 Å. The Ti(6)-O(19) bond length is 2.09 Å. The Ti(6)-O(20) bond length is 2.01 Å. The Ti(6)-O(25) bond length is 1.96 Å. Both Ti(6)-O(28) bond lengths are 2.01 Å. In the seventh Ti site, Ti(7) is bonded to one O(12), one O(15), one O(22), one O(24), and two equivalent O(29) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra, corners with two equivalent Ti(7)O6 octahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(5)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. The Ti(7)-O(12) bond length is 2.01 Å. The Ti(7)-O(15) bond length is 1.95 Å. The Ti(7)-O(22) bond length is 2.09 Å. The Ti(7)-O(24) bond length is 2.01 Å. Both Ti(7)-O(29) bond lengths are 2.01 Å. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(13), one O(20), one O(22), one O(23), and two equivalent O(30) atoms to form NbO6 octahedra that share  a cornercorner with one Ti(7)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Ti(6)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, faces with two equivalent Ba(6)O12 cuboctahedra, and faces with two equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. The Nb(1)-O(13) bond length is 2.02 Å. The Nb(1)-O(20) bond length is 2.02 Å. The Nb(1)-O(22) bond length is 2.06 Å. The Nb(1)-O(23) bond length is 1.97 Å. Both Nb(1)-O(30) bond lengths are 2.01 Å. In the second Nb site, Nb(2) is bonded to one O(21), one O(25), one O(26), one O(7), and two equivalent O(5) atoms to form NbO6 octahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(6)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. The Nb(2)-O(21) bond length is 2.03 Å. The Nb(2)-O(25) bond length is 1.95 Å. The Nb(2)-O(26) bond length is 1.99 Å. The Nb(2)-O(7) bond length is 2.08 Å. Both Nb(2)-O(5) bond lengths are 2.02 Å. In the third Nb site, Nb(3) is bonded to one O(10), one O(21), one O(23), one O(26), and two equivalent O(6) atoms to form NbO6 octahedra that share  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, faces with two equivalent Na(2)O12 cuboctahedra, faces with two equivalent Na(3)O12 cuboctahedra, and faces with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. The Nb(3)-O(10) bond length is 1.98 Å. The Nb(3)-O(21) bond length is 2.05 Å. The Nb(3)-O(23) bond length is 2.03 Å. The Nb(3)-O(26) bond length is 1.98 Å. Both Nb(3)-O(6) bond lengths are 2.01 Å. There are thirty inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Ba(1), one Ba(2), one Ba(4), and two equivalent Ti(1) atoms to form distorted OBa3NaTi2 octahedra that share corners with two equivalent O(1)Ba3NaTi2 octahedra, edges with two equivalent O(3)Ba3NaTi2 octahedra, faces with two equivalent O(8)Ba4Ti2 octahedra, and faces with two equivalent O(9)Ba4Ti2 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(2), one Ba(3), one Ba(4), one Ba(5), and two equivalent Ti(3) atoms. In the third O site, O(3) is bonded to one Na(1), one Ba(1), one Ba(2), one Ba(4), and two equivalent Ti(4) atoms to form distorted OBa3NaTi2 octahedra that share corners with two equivalent O(3)Ba3NaTi2 octahedra, corners with four equivalent O(8)Ba4Ti2 octahedra, edges with two equivalent O(1)Ba3NaTi2 octahedra, and faces with two equivalent O(9)Ba4Ti2 octahedra. The corner-sharing octahedral tilt angles range from 2-60°. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Ba(2), one Ba(3), one Ba(4), one Ba(5), and two equivalent Ti(2) atoms. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Na(1), one Na(2), one Na(3), one Ba(1), and two equivalent Nb(2) atoms. In the sixth O site, O(6) is bonded in a distorted linear geometry to one Na(1), one Na(2), one Na(3), one Ba(1), and two equivalent Nb(3) atoms. In the seventh O site, O(7) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Ba(1), one Ti(1), and one Nb(2) atom. In the eighth O site, O(8) is bonded to two equivalent Ba(2), two equivalent Ba(4), one Ti(1), and one Ti(3) atom to form distorted OBa4Ti2 octahedra that share corners with two equivalent O(9)Ba4Ti2 octahedra, corners with four equivalent O(3)Ba3NaTi2 octahedra, edges with two equivalent O(8)Ba4Ti2 octahedra,  a faceface with one O(9)Ba4Ti2 octahedra, and faces with two equivalent O(1)Ba3NaTi2 octahedra. The corner-sharing octahedral tilt angles range from 59-60°. In the ninth O site, O(9) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Ti(1), and one Ti(4) atom to form distorted OBa4Ti2 octahedra that share corners with two equivalent O(8)Ba4Ti2 octahedra, edges with two equivalent O(9)Ba4Ti2 octahedra,  a faceface with one O(8)Ba4Ti2 octahedra, faces with two equivalent O(1)Ba3NaTi2 octahedra, and faces with two equivalent O(3)Ba3NaTi2 octahedra. The corner-sharing octahedral tilt angles are 59°. In the tenth O site, O(10) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Ba(1), one Ti(4), and one Nb(3) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(3), one Ti(2), and one Ti(3) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(6), one Ti(5), and one Ti(7) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to two equivalent Na(3), two equivalent Ba(7), one Ti(6), and one Nb(1) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(4), one Ti(2), and one Ti(4) atom. In the fifteenth O site, O(15) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(5), one Ti(2), and one Ti(7) atom. In the sixteenth O site, O(16) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Ba(4), one Ti(1), and one Ti(4) atom. In the seventeenth O site, O(17) is bonded in a distorted linear geometry to two equivalent Ba(4), two equivalent Ba(5), one Ti(2), and one Ti(3) atom. In the eighteenth O site, O(18) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(5), one Ti(3), and one Ti(5) atom. In the nineteenth O site, O(19) is bonded to two equivalent Ba(6), two equivalent Ba(7), one Ti(5), and one Ti(6) atom to form distorted OBa4Ti2 octahedra that share corners with four equivalent O(22)Ba4TiNb octahedra, edges with two equivalent O(19)Ba4Ti2 octahedra, edges with two equivalent O(22)Ba4TiNb octahedra, and faces with two equivalent O(28)Ba2Na2Ti2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the twentieth O site, O(20) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Ba(6), one Ti(6), and one Nb(1) atom. In the twenty-first O site, O(21) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Ba(1), one Nb(2), and one Nb(3) atom. In the twenty-second O site, O(22) is bonded to two equivalent Ba(6), two equivalent Ba(7), one Ti(7), and one Nb(1) atom to form distorted OBa4TiNb octahedra that share corners with four equivalent O(28)Ba2Na2Ti2 octahedra, corners with four equivalent O(19)Ba4Ti2 octahedra, edges with two equivalent O(19)Ba4Ti2 octahedra, and edges with two equivalent O(22)Ba4TiNb octahedra. The corner-sharing octahedral tilt angles range from 1-61°. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Na(3), one Nb(1), and one Nb(3) atom. In the twenty-fourth O site, O(24) is bonded in a distorted linear geometry to two equivalent Ba(5), two equivalent Ba(7), one Ti(5), and one Ti(7) atom. In the twenty-fifth O site, O(25) is bonded in a distorted linear geometry to two equivalent Na(2), two equivalent Na(3), one Ti(6), and one Nb(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted linear geometry to two equivalent Na(1), two equivalent Na(3), one Nb(2), and one Nb(3) atom. In the twenty-seventh O site, O(27) is bonded in a distorted linear geometry to one Ba(3), one Ba(5), one Ba(6), one Ba(7), and two equivalent Ti(5) atoms. In the twenty-eighth O site, O(28) is bonded to one Na(2), one Na(3), one Ba(6), one Ba(7), and two equivalent Ti(6) atoms to form distorted OBa2Na2Ti2 octahedra that share corners with two equivalent O(28)Ba2Na2Ti2 octahedra, corners with four equivalent O(22)Ba4TiNb octahedra, and faces with two equivalent O(19)Ba4Ti2 octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the twenty-ninth O site, O(29) is bonded in a distorted linear geometry to one Ba(3), one Ba(5), one Ba(6), one Ba(7), and two equivalent Ti(7) atoms. In the thirtieth O site, O(30) is bonded in a distorted linear geometry to one Na(2), one Na(3), one Ba(6), one Ba(7), and two equivalent Nb(1) atoms.