Ba2TaMnO6 is (Cubic) Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(10), one O(21), one O(22), one O(5), one O(6), one O(9), two equivalent O(1), two equivalent O(13), and two equivalent O(17) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(2)O12 cuboctahedra, corners with three equivalent Ba(3)O12 cuboctahedra, corners with six equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Ba(5)O12 cuboctahedra, faces with three equivalent Ba(6)O12 cuboctahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Mn(1)O6 octahedra, faces with three equivalent Ta(1)O6 octahedra, and faces with three equivalent Mn(2)O6 octahedra. In the second Ba site, Ba(2) is bonded to one O(10), one O(12), one O(22), one O(24), one O(6), one O(8), two equivalent O(14), two equivalent O(18), and two equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Ba(4)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra, faces with three equivalent Ba(6)O12 cuboctahedra, faces with three equivalent Ba(8)O12 cuboctahedra,  a faceface with one Ta(4)O6 octahedra,  a faceface with one Mn(2)O6 octahedra, faces with three equivalent Ta(2)O6 octahedra, and faces with three equivalent Mn(4)O6 octahedra. In the third Ba site, Ba(3) is bonded to one O(11), one O(21), one O(23), one O(5), one O(7), one O(9), two equivalent O(15), two equivalent O(19), and two equivalent O(3) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Ba(4)O12 cuboctahedra, corners with six equivalent Ba(3)O12 cuboctahedra, faces with three equivalent Ba(5)O12 cuboctahedra, faces with three equivalent Ba(7)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Mn(3)O6 octahedra, faces with three equivalent Ta(3)O6 octahedra, and faces with three equivalent Mn(1)O6 octahedra. In the fourth Ba site, Ba(4) is bonded to one O(11), one O(12), one O(23), one O(24), one O(7), one O(8), two equivalent O(16), two equivalent O(20), and two equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(2)O12 cuboctahedra, corners with three equivalent Ba(3)O12 cuboctahedra, corners with six equivalent Ba(4)O12 cuboctahedra, faces with three equivalent Ba(7)O12 cuboctahedra, faces with three equivalent Ba(8)O12 cuboctahedra,  a faceface with one Ta(3)O6 octahedra,  a faceface with one Mn(4)O6 octahedra, faces with three equivalent Ta(4)O6 octahedra, and faces with three equivalent Mn(3)O6 octahedra. In the fifth Ba site, Ba(5) is bonded to one O(1), one O(13), one O(15), one O(17), one O(19), one O(3), two equivalent O(21), two equivalent O(5), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(6)O12 cuboctahedra, corners with three equivalent Ba(7)O12 cuboctahedra, corners with six equivalent Ba(5)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ta(3)O6 octahedra,  a faceface with one Mn(2)O6 octahedra, faces with three equivalent Ta(1)O6 octahedra, and faces with three equivalent Mn(1)O6 octahedra. In the sixth Ba site, Ba(6) is bonded to one O(1), one O(13), one O(14), one O(17), one O(18), one O(2), two equivalent O(10), two equivalent O(22), and two equivalent O(6) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(5)O12 cuboctahedra, corners with three equivalent Ba(8)O12 cuboctahedra, corners with six equivalent Ba(6)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Mn(4)O6 octahedra, faces with three equivalent Ta(2)O6 octahedra, and faces with three equivalent Mn(2)O6 octahedra. In the seventh Ba site, Ba(7) is bonded to one O(15), one O(16), one O(19), one O(20), one O(3), one O(4), two equivalent O(11), two equivalent O(23), and two equivalent O(7) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(5)O12 cuboctahedra, corners with three equivalent Ba(8)O12 cuboctahedra, corners with six equivalent Ba(7)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ta(4)O6 octahedra,  a faceface with one Mn(1)O6 octahedra, faces with three equivalent Ta(3)O6 octahedra, and faces with three equivalent Mn(3)O6 octahedra. In the eighth Ba site, Ba(8) is bonded to one O(14), one O(16), one O(18), one O(2), one O(20), one O(4), two equivalent O(12), two equivalent O(24), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(6)O12 cuboctahedra, corners with three equivalent Ba(7)O12 cuboctahedra, corners with six equivalent Ba(8)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Mn(3)O6 octahedra, faces with three equivalent Ta(4)O6 octahedra, and faces with three equivalent Mn(4)O6 octahedra. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(13), one O(17), one O(21), one O(5), and one O(9) atom to form TaO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra,  a faceface with one Ba(3)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, and faces with three equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-4°. In the second Ta site, Ta(2) is bonded to one O(10), one O(14), one O(18), one O(2), one O(22), and one O(6) atom to form TaO6 octahedra that share corners with three equivalent Mn(2)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(8)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. In the third Ta site, Ta(3) is bonded to one O(11), one O(15), one O(19), one O(23), one O(3), and one O(7) atom to form TaO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(3)O6 octahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra, and faces with three equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. In the fourth Ta site, Ta(4) is bonded to one O(12), one O(16), one O(20), one O(24), one O(4), and one O(8) atom to form TaO6 octahedra that share corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra, and faces with three equivalent Ba(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(15), one O(19), one O(21), one O(3), one O(5), and one O(9) atom to form MnO6 octahedra that share corners with three equivalent Ta(1)O6 octahedra, corners with three equivalent Ta(3)O6 octahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra, and faces with three equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-4°. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(13), one O(17), one O(22), and one O(6) atom to form MnO6 octahedra that share corners with three equivalent Ta(1)O6 octahedra, corners with three equivalent Ta(2)O6 octahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, and faces with three equivalent Ba(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. In the third Mn site, Mn(3) is bonded to one O(11), one O(16), one O(20), one O(23), one O(4), and one O(7) atom to form MnO6 octahedra that share corners with three equivalent Ta(3)O6 octahedra, corners with three equivalent Ta(4)O6 octahedra,  a faceface with one Ba(3)O12 cuboctahedra,  a faceface with one Ba(8)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra, and faces with three equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. In the fourth Mn site, Mn(4) is bonded to one O(12), one O(14), one O(18), one O(2), one O(24), and one O(8) atom to form MnO6 octahedra that share corners with three equivalent Ta(2)O6 octahedra, corners with three equivalent Ta(4)O6 octahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(5), one Ba(6), two equivalent Ba(1), one Ta(1), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(6), one Ba(8), two equivalent Ba(2), one Ta(2), and one Mn(4) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Ba(5), one Ba(7), two equivalent Ba(3), one Ta(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(7), one Ba(8), two equivalent Ba(4), one Ta(4), and one Mn(3) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(5), one Ta(1), and one Mn(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(6), one Ta(2), and one Mn(2) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(7), one Ta(3), and one Mn(3) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(8), one Ta(4), and one Mn(4) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(5), one Ta(1), and one Mn(1) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to one Ba(1), one Ba(2), two equivalent Ba(6), one Ta(2), and one Mn(2) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to one Ba(3), one Ba(4), two equivalent Ba(7), one Ta(3), and one Mn(3) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(8), one Ta(4), and one Mn(4) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one Ba(5), one Ba(6), two equivalent Ba(1), one Ta(1), and one Mn(2) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one Ba(6), one Ba(8), two equivalent Ba(2), one Ta(2), and one Mn(4) atom. In the fifteenth O site, O(15) is bonded in a distorted linear geometry to one Ba(5), one Ba(7), two equivalent Ba(3), one Ta(3), and one Mn(1) atom. In the sixteenth O site, O(16) is bonded in a distorted linear geometry to one Ba(7), one Ba(8), two equivalent Ba(4), one Ta(4), and one Mn(3) atom. In the seventeenth O site, O(17) is bonded in a distorted linear geometry to one Ba(5), one Ba(6), two equivalent Ba(1), one Ta(1), and one Mn(2) atom. In the eighteenth O site, O(18) is bonded in a 6-coordinate geometry to one Ba(6), one Ba(8), two equivalent Ba(2), one Ta(2), and one Mn(4) atom. In the nineteenth O site, O(19) is bonded in a 6-coordinate geometry to one Ba(5), one Ba(7), two equivalent Ba(3), one Ta(3), and one Mn(1) atom. In the twentieth O site, O(20) is bonded in a distorted linear geometry to one Ba(7), one Ba(8), two equivalent Ba(4), one Ta(4), and one Mn(3) atom. In the twenty-first O site, O(21) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(3), two equivalent Ba(5), one Ta(1), and one Mn(1) atom. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Ba(1), one Ba(2), two equivalent Ba(6), one Ta(2), and one Mn(2) atom. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to one Ba(3), one Ba(4), two equivalent Ba(7), one Ta(3), and one Mn(3) atom. In the twenty-fourth O site, O(24) is bonded in a 6-coordinate geometry to one Ba(2), one Ba(4), two equivalent Ba(8), one Ta(4), and one Mn(4) atom.
Ba2TaMnO6 is (Cubic) Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(10), one O(21), one O(22), one O(5), one O(6), one O(9), two equivalent O(1), two equivalent O(13), and two equivalent O(17) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(2)O12 cuboctahedra, corners with three equivalent Ba(3)O12 cuboctahedra, corners with six equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Ba(5)O12 cuboctahedra, faces with three equivalent Ba(6)O12 cuboctahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Mn(1)O6 octahedra, faces with three equivalent Ta(1)O6 octahedra, and faces with three equivalent Mn(2)O6 octahedra. The Ba(1)-O(10) bond length is 2.93 Å. The Ba(1)-O(21) bond length is 2.95 Å. The Ba(1)-O(22) bond length is 3.02 Å. The Ba(1)-O(5) bond length is 2.84 Å. The Ba(1)-O(6) bond length is 2.80 Å. The Ba(1)-O(9) bond length is 2.93 Å. There is one shorter (2.86 Å) and one longer (2.94 Å) Ba(1)-O(1) bond length. There is one shorter (2.89 Å) and one longer (3.01 Å) Ba(1)-O(13) bond length. There is one shorter (2.87 Å) and one longer (2.91 Å) Ba(1)-O(17) bond length. In the second Ba site, Ba(2) is bonded to one O(10), one O(12), one O(22), one O(24), one O(6), one O(8), two equivalent O(14), two equivalent O(18), and two equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Ba(4)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra, faces with three equivalent Ba(6)O12 cuboctahedra, faces with three equivalent Ba(8)O12 cuboctahedra,  a faceface with one Ta(4)O6 octahedra,  a faceface with one Mn(2)O6 octahedra, faces with three equivalent Ta(2)O6 octahedra, and faces with three equivalent Mn(4)O6 octahedra. The Ba(2)-O(10) bond length is 2.93 Å. The Ba(2)-O(12) bond length is 2.95 Å. The Ba(2)-O(22) bond length is 2.82 Å. The Ba(2)-O(24) bond length is 2.81 Å. The Ba(2)-O(6) bond length is 2.95 Å. The Ba(2)-O(8) bond length is 3.00 Å. There is one shorter (2.89 Å) and one longer (3.00 Å) Ba(2)-O(14) bond length. There is one shorter (2.86 Å) and one longer (2.93 Å) Ba(2)-O(18) bond length. There is one shorter (2.87 Å) and one longer (2.91 Å) Ba(2)-O(2) bond length. In the third Ba site, Ba(3) is bonded to one O(11), one O(21), one O(23), one O(5), one O(7), one O(9), two equivalent O(15), two equivalent O(19), and two equivalent O(3) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Ba(4)O12 cuboctahedra, corners with six equivalent Ba(3)O12 cuboctahedra, faces with three equivalent Ba(5)O12 cuboctahedra, faces with three equivalent Ba(7)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Mn(3)O6 octahedra, faces with three equivalent Ta(3)O6 octahedra, and faces with three equivalent Mn(1)O6 octahedra. The Ba(3)-O(11) bond length is 2.93 Å. The Ba(3)-O(21) bond length is 2.81 Å. The Ba(3)-O(23) bond length is 2.83 Å. The Ba(3)-O(5) bond length is 3.00 Å. The Ba(3)-O(7) bond length is 2.96 Å. The Ba(3)-O(9) bond length is 2.95 Å. There is one shorter (2.89 Å) and one longer (3.00 Å) Ba(3)-O(15) bond length. There is one shorter (2.86 Å) and one longer (2.93 Å) Ba(3)-O(19) bond length. There is one shorter (2.87 Å) and one longer (2.91 Å) Ba(3)-O(3) bond length. In the fourth Ba site, Ba(4) is bonded to one O(11), one O(12), one O(23), one O(24), one O(7), one O(8), two equivalent O(16), two equivalent O(20), and two equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(2)O12 cuboctahedra, corners with three equivalent Ba(3)O12 cuboctahedra, corners with six equivalent Ba(4)O12 cuboctahedra, faces with three equivalent Ba(7)O12 cuboctahedra, faces with three equivalent Ba(8)O12 cuboctahedra,  a faceface with one Ta(3)O6 octahedra,  a faceface with one Mn(4)O6 octahedra, faces with three equivalent Ta(4)O6 octahedra, and faces with three equivalent Mn(3)O6 octahedra. The Ba(4)-O(11) bond length is 2.93 Å. The Ba(4)-O(12) bond length is 2.94 Å. The Ba(4)-O(23) bond length is 3.02 Å. The Ba(4)-O(24) bond length is 2.96 Å. The Ba(4)-O(7) bond length is 2.80 Å. The Ba(4)-O(8) bond length is 2.84 Å. There is one shorter (2.89 Å) and one longer (3.01 Å) Ba(4)-O(16) bond length. There is one shorter (2.87 Å) and one longer (2.91 Å) Ba(4)-O(20) bond length. There is one shorter (2.87 Å) and one longer (2.93 Å) Ba(4)-O(4) bond length. In the fifth Ba site, Ba(5) is bonded to one O(1), one O(13), one O(15), one O(17), one O(19), one O(3), two equivalent O(21), two equivalent O(5), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(6)O12 cuboctahedra, corners with three equivalent Ba(7)O12 cuboctahedra, corners with six equivalent Ba(5)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ta(3)O6 octahedra,  a faceface with one Mn(2)O6 octahedra, faces with three equivalent Ta(1)O6 octahedra, and faces with three equivalent Mn(1)O6 octahedra. The Ba(5)-O(1) bond length is 2.96 Å. The Ba(5)-O(13) bond length is 2.93 Å. The Ba(5)-O(15) bond length is 2.95 Å. The Ba(5)-O(17) bond length is 2.82 Å. The Ba(5)-O(19) bond length is 2.81 Å. The Ba(5)-O(3) bond length is 3.00 Å. There is one shorter (2.86 Å) and one longer (2.93 Å) Ba(5)-O(21) bond length. There is one shorter (2.87 Å) and one longer (2.91 Å) Ba(5)-O(5) bond length. There is one shorter (2.90 Å) and one longer (3.00 Å) Ba(5)-O(9) bond length. In the sixth Ba site, Ba(6) is bonded to one O(1), one O(13), one O(14), one O(17), one O(18), one O(2), two equivalent O(10), two equivalent O(22), and two equivalent O(6) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(5)O12 cuboctahedra, corners with three equivalent Ba(8)O12 cuboctahedra, corners with six equivalent Ba(6)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra,  a faceface with one Ta(1)O6 octahedra,  a faceface with one Mn(4)O6 octahedra, faces with three equivalent Ta(2)O6 octahedra, and faces with three equivalent Mn(2)O6 octahedra. The Ba(6)-O(1) bond length is 2.81 Å. The Ba(6)-O(13) bond length is 2.93 Å. The Ba(6)-O(14) bond length is 2.94 Å. The Ba(6)-O(17) bond length is 3.03 Å. The Ba(6)-O(18) bond length is 2.95 Å. The Ba(6)-O(2) bond length is 2.84 Å. There is one shorter (2.89 Å) and one longer (3.01 Å) Ba(6)-O(10) bond length. There is one shorter (2.87 Å) and one longer (2.92 Å) Ba(6)-O(22) bond length. There is one shorter (2.86 Å) and one longer (2.93 Å) Ba(6)-O(6) bond length. In the seventh Ba site, Ba(7) is bonded to one O(15), one O(16), one O(19), one O(20), one O(3), one O(4), two equivalent O(11), two equivalent O(23), and two equivalent O(7) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(5)O12 cuboctahedra, corners with three equivalent Ba(8)O12 cuboctahedra, corners with six equivalent Ba(7)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ta(4)O6 octahedra,  a faceface with one Mn(1)O6 octahedra, faces with three equivalent Ta(3)O6 octahedra, and faces with three equivalent Mn(3)O6 octahedra. The Ba(7)-O(15) bond length is 2.94 Å. The Ba(7)-O(16) bond length is 2.93 Å. The Ba(7)-O(19) bond length is 2.95 Å. The Ba(7)-O(20) bond length is 3.02 Å. The Ba(7)-O(3) bond length is 2.84 Å. The Ba(7)-O(4) bond length is 2.80 Å. There is one shorter (2.89 Å) and one longer (3.01 Å) Ba(7)-O(11) bond length. There is one shorter (2.87 Å) and one longer (2.91 Å) Ba(7)-O(23) bond length. There is one shorter (2.86 Å) and one longer (2.94 Å) Ba(7)-O(7) bond length. In the eighth Ba site, Ba(8) is bonded to one O(14), one O(16), one O(18), one O(2), one O(20), one O(4), two equivalent O(12), two equivalent O(24), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with three equivalent Ba(6)O12 cuboctahedra, corners with three equivalent Ba(7)O12 cuboctahedra, corners with six equivalent Ba(8)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ta(2)O6 octahedra,  a faceface with one Mn(3)O6 octahedra, faces with three equivalent Ta(4)O6 octahedra, and faces with three equivalent Mn(4)O6 octahedra. The Ba(8)-O(14) bond length is 2.95 Å. The Ba(8)-O(16) bond length is 2.93 Å. The Ba(8)-O(18) bond length is 2.81 Å. The Ba(8)-O(2) bond length is 3.00 Å. The Ba(8)-O(20) bond length is 2.83 Å. The Ba(8)-O(4) bond length is 2.95 Å. There is one shorter (2.89 Å) and one longer (3.00 Å) Ba(8)-O(12) bond length. There is one shorter (2.86 Å) and one longer (2.93 Å) Ba(8)-O(24) bond length. There is one shorter (2.87 Å) and one longer (2.91 Å) Ba(8)-O(8) bond length. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(13), one O(17), one O(21), one O(5), and one O(9) atom to form TaO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra,  a faceface with one Ba(3)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, and faces with three equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-4°. The Ta(1)-O(1) bond length is 1.94 Å. The Ta(1)-O(13) bond length is 2.02 Å. The Ta(1)-O(17) bond length is 2.10 Å. The Ta(1)-O(21) bond length is 1.94 Å. The Ta(1)-O(5) bond length is 2.10 Å. The Ta(1)-O(9) bond length is 2.02 Å. In the second Ta site, Ta(2) is bonded to one O(10), one O(14), one O(18), one O(2), one O(22), and one O(6) atom to form TaO6 octahedra that share corners with three equivalent Mn(2)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(8)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. The Ta(2)-O(10) bond length is 2.02 Å. The Ta(2)-O(14) bond length is 2.02 Å. The Ta(2)-O(18) bond length is 1.94 Å. The Ta(2)-O(2) bond length is 2.10 Å. The Ta(2)-O(22) bond length is 2.10 Å. The Ta(2)-O(6) bond length is 1.94 Å. In the third Ta site, Ta(3) is bonded to one O(11), one O(15), one O(19), one O(23), one O(3), and one O(7) atom to form TaO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(3)O6 octahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra, and faces with three equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. The Ta(3)-O(11) bond length is 2.02 Å. The Ta(3)-O(15) bond length is 2.02 Å. The Ta(3)-O(19) bond length is 1.94 Å. The Ta(3)-O(23) bond length is 2.10 Å. The Ta(3)-O(3) bond length is 2.10 Å. The Ta(3)-O(7) bond length is 1.94 Å. In the fourth Ta site, Ta(4) is bonded to one O(12), one O(16), one O(20), one O(24), one O(4), and one O(8) atom to form TaO6 octahedra that share corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra, and faces with three equivalent Ba(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. The Ta(4)-O(12) bond length is 2.02 Å. The Ta(4)-O(16) bond length is 2.02 Å. The Ta(4)-O(20) bond length is 2.10 Å. The Ta(4)-O(24) bond length is 1.94 Å. The Ta(4)-O(4) bond length is 1.94 Å. The Ta(4)-O(8) bond length is 2.10 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(15), one O(19), one O(21), one O(3), one O(5), and one O(9) atom to form MnO6 octahedra that share corners with three equivalent Ta(1)O6 octahedra, corners with three equivalent Ta(3)O6 octahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(7)O12 cuboctahedra, faces with three equivalent Ba(3)O12 cuboctahedra, and faces with three equivalent Ba(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-4°. The Mn(1)-O(15) bond length is 2.00 Å. The Mn(1)-O(19) bond length is 2.28 Å. The Mn(1)-O(21) bond length is 2.27 Å. The Mn(1)-O(3) bond length is 2.01 Å. The Mn(1)-O(5) bond length is 2.01 Å. The Mn(1)-O(9) bond length is 2.00 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(13), one O(17), one O(22), and one O(6) atom to form MnO6 octahedra that share corners with three equivalent Ta(1)O6 octahedra, corners with three equivalent Ta(2)O6 octahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(5)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, and faces with three equivalent Ba(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. The Mn(2)-O(1) bond length is 2.27 Å. The Mn(2)-O(10) bond length is 2.01 Å. The Mn(2)-O(13) bond length is 2.01 Å. The Mn(2)-O(17) bond length is 2.01 Å. The Mn(2)-O(22) bond length is 2.01 Å. The Mn(2)-O(6) bond length is 2.27 Å. In the third Mn site, Mn(3) is bonded to one O(11), one O(16), one O(20), one O(23), one O(4), and one O(7) atom to form MnO6 octahedra that share corners with three equivalent Ta(3)O6 octahedra, corners with three equivalent Ta(4)O6 octahedra,  a faceface with one Ba(3)O12 cuboctahedra,  a faceface with one Ba(8)O12 cuboctahedra, faces with three equivalent Ba(4)O12 cuboctahedra, and faces with three equivalent Ba(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. The Mn(3)-O(11) bond length is 2.01 Å. The Mn(3)-O(16) bond length is 2.01 Å. The Mn(3)-O(20) bond length is 2.01 Å. The Mn(3)-O(23) bond length is 2.01 Å. The Mn(3)-O(4) bond length is 2.27 Å. The Mn(3)-O(7) bond length is 2.27 Å. In the fourth Mn site, Mn(4) is bonded to one O(12), one O(14), one O(18), one O(2), one O(24), and one O(8) atom to form MnO6 octahedra that share corners with three equivalent Ta(2)O6 octahedra, corners with three equivalent Ta(4)O6 octahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Ba(6)O12 cuboctahedra, faces with three equivalent Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. The Mn(4)-O(12) bond length is 2.00 Å. The Mn(4)-O(14) bond length is 2.00 Å. The Mn(4)-O(18) bond length is 2.28 Å. The Mn(4)-O(2) bond length is 2.01 Å. The Mn(4)-O(24) bond length is 2.27 Å. The Mn(4)-O(8) bond length is 2.01 Å. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(5), one Ba(6), two equivalent Ba(1), one Ta(1), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(6), one Ba(8), two equivalent Ba(2), one Ta(2), and one Mn(4) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Ba(5), one Ba(7), two equivalent Ba(3), one Ta(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(7), one Ba(8), two equivalent Ba(4), one Ta(4), and one Mn(3) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(5), one Ta(1), and one Mn(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), two equivalent Ba(6), one Ta(2), and one Mn(2) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Ba(3), one Ba(4), two equivalent Ba(7), one Ta(3), and one Mn(3) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(8), one Ta(4), and one Mn(4) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(5), one Ta(1), and one Mn(1) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to one Ba(1), one Ba(2), two equivalent Ba(6), one Ta(2), and one Mn(2) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to one Ba(3), one Ba(4), two equivalent Ba(7), one Ta(3), and one Mn(3) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(8), one Ta(4), and one Mn(4) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one Ba(5), one Ba(6), two equivalent Ba(1), one Ta(1), and one Mn(2) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one Ba(6), one Ba(8), two equivalent Ba(2), one Ta(2), and one Mn(4) atom. In the fifteenth O site, O(15) is bonded in a distorted linear geometry to one Ba(5), one Ba(7), two equivalent Ba(3), one Ta(3), and one Mn(1) atom. In the sixteenth O site, O(16) is bonded in a distorted linear geometry to one Ba(7), one Ba(8), two equivalent Ba(4), one Ta(4), and one Mn(3) atom. In the seventeenth O site, O(17) is bonded in a distorted linear geometry to one Ba(5), one Ba(6), two equivalent Ba(1), one Ta(1), and one Mn(2) atom. In the eighteenth O site, O(18) is bonded in a 6-coordinate geometry to one Ba(6), one Ba(8), two equivalent Ba(2), one Ta(2), and one Mn(4) atom. In the nineteenth O site, O(19) is bonded in a 6-coordinate geometry to one Ba(5), one Ba(7), two equivalent Ba(3), one Ta(3), and one Mn(1) atom. In the twentieth O site, O(20) is bonded in a distorted linear geometry to one Ba(7), one Ba(8), two equivalent Ba(4), one Ta(4), and one Mn(3) atom. In the twenty-first O site, O(21) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(3), two equivalent Ba(5), one Ta(1), and one Mn(1) atom. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Ba(1), one Ba(2), two equivalent Ba(6), one Ta(2), and one Mn(2) atom. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to one Ba(3), one Ba(4), two equivalent Ba(7), one Ta(3), and one Mn(3) atom. In the twenty-fourth O site, O(24) is bonded in a 6-coordinate geometry to one Ba(2), one Ba(4), two equivalent Ba(8), one Ta(4), and one Mn(4) atom.