Na3Te(AsO7)2 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(16), one O(2), one O(21), one O(24), one O(3), and one O(6) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(1)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(2)O6 pentagonal pyramid, and  an edgeedge with one Na(5)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 48°. In the second Na site, Na(2) is bonded to one O(14), one O(17), one O(2), one O(28), one O(3), and one O(9) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(1)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(1)O6 pentagonal pyramid, and  an edgeedge with one Na(5)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 47-51°. In the third Na site, Na(3) is bonded to one O(1), one O(10), one O(15), one O(20), one O(25), and one O(4) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(4)O6 pentagonal pyramid, and  an edgeedge with one Na(6)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 48°. In the fourth Na site, Na(4) is bonded to one O(1), one O(11), one O(13), one O(19), one O(27), and one O(4) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(3)O6 pentagonal pyramid, and  an edgeedge with one Na(6)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 48-50°. In the fifth Na site, Na(5) is bonded to one O(12), one O(18), one O(2), one O(26), one O(3), and one O(5) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(1)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(1)O6 pentagonal pyramid, and  an edgeedge with one Na(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 47-51°. In the sixth Na site, Na(6) is bonded to one O(1), one O(22), one O(23), one O(4), one O(7), and one O(8) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(3)O6 pentagonal pyramid, and  an edgeedge with one Na(4)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 48-50°. There are four inequivalent As sites. In the first As site, As(1) is bonded to one O(17), one O(18), one O(21), and one O(4) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. In the second As site, As(2) is bonded to one O(19), one O(22), one O(25), and one O(3) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. In the third As site, As(3) is bonded to one O(2), one O(20), one O(23), and one O(27) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. In the fourth As site, As(4) is bonded to one O(1), one O(24), one O(26), and one O(28) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(12), one O(14), one O(16), one O(5), one O(6), and one O(9) atom to form TeO6 octahedra that share corners with two equivalent Na(1)O6 pentagonal pyramids, corners with two equivalent Na(2)O6 pentagonal pyramids, and corners with two equivalent Na(5)O6 pentagonal pyramids. In the second Te site, Te(2) is bonded to one O(10), one O(11), one O(13), one O(15), one O(7), and one O(8) atom to form TeO6 octahedra that share corners with two equivalent Na(3)O6 pentagonal pyramids, corners with two equivalent Na(4)O6 pentagonal pyramids, and corners with two equivalent Na(6)O6 pentagonal pyramids. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Na(3), one Na(4), one Na(6), and one As(4) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Na(5), and one As(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Na(5), and one As(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Na(3), one Na(4), one Na(6), and one As(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(5) and one Te(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Na(1) and one Te(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Na(6) and one Te(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Na(6) and one Te(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Na(2) and one Te(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Na(3) and one Te(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Na(4) and one Te(2) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Na(5) and one Te(1) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Na(4) and one Te(2) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Na(2) and one Te(1) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Na(3) and one Te(2) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one Te(1) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 120 degrees geometry to one Na(2) and one As(1) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one Na(5) and one As(1) atom. In the nineteenth O site, O(19) is bonded in a distorted bent 150 degrees geometry to one Na(4) and one As(2) atom. In the twentieth O site, O(20) is bonded in a distorted bent 120 degrees geometry to one Na(3) and one As(3) atom. In the twenty-first O site, O(21) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one As(1) atom. In the twenty-second O site, O(22) is bonded in a distorted bent 150 degrees geometry to one Na(6) and one As(2) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 150 degrees geometry to one Na(6) and one As(3) atom. In the twenty-fourth O site, O(24) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one As(4) atom. In the twenty-fifth O site, O(25) is bonded in a distorted bent 120 degrees geometry to one Na(3) and one As(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted bent 120 degrees geometry to one Na(5) and one As(4) atom. In the twenty-seventh O site, O(27) is bonded in a distorted bent 150 degrees geometry to one Na(4) and one As(3) atom. In the twenty-eighth O site, O(28) is bonded in a distorted bent 150 degrees geometry to one Na(2) and one As(4) atom.
Na3Te(AsO7)2 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(16), one O(2), one O(21), one O(24), one O(3), and one O(6) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(1)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(2)O6 pentagonal pyramid, and  an edgeedge with one Na(5)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 48°. The Na(1)-O(16) bond length is 2.47 Å. The Na(1)-O(2) bond length is 2.39 Å. The Na(1)-O(21) bond length is 2.43 Å. The Na(1)-O(24) bond length is 2.43 Å. The Na(1)-O(3) bond length is 2.38 Å. The Na(1)-O(6) bond length is 2.47 Å. In the second Na site, Na(2) is bonded to one O(14), one O(17), one O(2), one O(28), one O(3), and one O(9) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(1)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(1)O6 pentagonal pyramid, and  an edgeedge with one Na(5)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 47-51°. The Na(2)-O(14) bond length is 2.46 Å. The Na(2)-O(17) bond length is 2.45 Å. The Na(2)-O(2) bond length is 2.39 Å. The Na(2)-O(28) bond length is 2.42 Å. The Na(2)-O(3) bond length is 2.40 Å. The Na(2)-O(9) bond length is 2.46 Å. In the third Na site, Na(3) is bonded to one O(1), one O(10), one O(15), one O(20), one O(25), and one O(4) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(4)O6 pentagonal pyramid, and  an edgeedge with one Na(6)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 48°. The Na(3)-O(1) bond length is 2.39 Å. The Na(3)-O(10) bond length is 2.46 Å. The Na(3)-O(15) bond length is 2.47 Å. The Na(3)-O(20) bond length is 2.44 Å. The Na(3)-O(25) bond length is 2.44 Å. The Na(3)-O(4) bond length is 2.39 Å. In the fourth Na site, Na(4) is bonded to one O(1), one O(11), one O(13), one O(19), one O(27), and one O(4) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(3)O6 pentagonal pyramid, and  an edgeedge with one Na(6)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 48-50°. The Na(4)-O(1) bond length is 2.40 Å. The Na(4)-O(11) bond length is 2.46 Å. The Na(4)-O(13) bond length is 2.46 Å. The Na(4)-O(19) bond length is 2.42 Å. The Na(4)-O(27) bond length is 2.45 Å. The Na(4)-O(4) bond length is 2.39 Å. In the fifth Na site, Na(5) is bonded to one O(12), one O(18), one O(2), one O(26), one O(3), and one O(5) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(1)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(1)O6 pentagonal pyramid, and  an edgeedge with one Na(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 47-51°. The Na(5)-O(12) bond length is 2.46 Å. The Na(5)-O(18) bond length is 2.41 Å. The Na(5)-O(2) bond length is 2.41 Å. The Na(5)-O(26) bond length is 2.45 Å. The Na(5)-O(3) bond length is 2.39 Å. The Na(5)-O(5) bond length is 2.46 Å. In the sixth Na site, Na(6) is bonded to one O(1), one O(22), one O(23), one O(4), one O(7), and one O(8) atom to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Te(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  an edgeedge with one Na(3)O6 pentagonal pyramid, and  an edgeedge with one Na(4)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 48-50°. The Na(6)-O(1) bond length is 2.39 Å. The Na(6)-O(22) bond length is 2.45 Å. The Na(6)-O(23) bond length is 2.42 Å. The Na(6)-O(4) bond length is 2.40 Å. The Na(6)-O(7) bond length is 2.46 Å. The Na(6)-O(8) bond length is 2.46 Å. There are four inequivalent As sites. In the first As site, As(1) is bonded to one O(17), one O(18), one O(21), and one O(4) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. The As(1)-O(17) bond length is 1.75 Å. The As(1)-O(18) bond length is 1.74 Å. The As(1)-O(21) bond length is 1.76 Å. The As(1)-O(4) bond length is 1.67 Å. In the second As site, As(2) is bonded to one O(19), one O(22), one O(25), and one O(3) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. The As(2)-O(19) bond length is 1.74 Å. The As(2)-O(22) bond length is 1.76 Å. The As(2)-O(25) bond length is 1.75 Å. The As(2)-O(3) bond length is 1.68 Å. In the third As site, As(3) is bonded to one O(2), one O(20), one O(23), and one O(27) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. The As(3)-O(2) bond length is 1.67 Å. The As(3)-O(20) bond length is 1.75 Å. The As(3)-O(23) bond length is 1.74 Å. The As(3)-O(27) bond length is 1.76 Å. In the fourth As site, As(4) is bonded to one O(1), one O(24), one O(26), and one O(28) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one Na(2)O6 pentagonal pyramid,  a cornercorner with one Na(3)O6 pentagonal pyramid,  a cornercorner with one Na(4)O6 pentagonal pyramid,  a cornercorner with one Na(5)O6 pentagonal pyramid, and  a cornercorner with one Na(6)O6 pentagonal pyramid. The As(4)-O(1) bond length is 1.68 Å. The As(4)-O(24) bond length is 1.75 Å. The As(4)-O(26) bond length is 1.75 Å. The As(4)-O(28) bond length is 1.74 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(12), one O(14), one O(16), one O(5), one O(6), and one O(9) atom to form TeO6 octahedra that share corners with two equivalent Na(1)O6 pentagonal pyramids, corners with two equivalent Na(2)O6 pentagonal pyramids, and corners with two equivalent Na(5)O6 pentagonal pyramids. The Te(1)-O(12) bond length is 1.94 Å. The Te(1)-O(14) bond length is 1.92 Å. The Te(1)-O(16) bond length is 1.94 Å. The Te(1)-O(5) bond length is 1.92 Å. The Te(1)-O(6) bond length is 1.94 Å. The Te(1)-O(9) bond length is 1.95 Å. In the second Te site, Te(2) is bonded to one O(10), one O(11), one O(13), one O(15), one O(7), and one O(8) atom to form TeO6 octahedra that share corners with two equivalent Na(3)O6 pentagonal pyramids, corners with two equivalent Na(4)O6 pentagonal pyramids, and corners with two equivalent Na(6)O6 pentagonal pyramids. The Te(2)-O(10) bond length is 1.94 Å. The Te(2)-O(11) bond length is 1.93 Å. The Te(2)-O(13) bond length is 1.94 Å. The Te(2)-O(15) bond length is 1.94 Å. The Te(2)-O(7) bond length is 1.93 Å. The Te(2)-O(8) bond length is 1.94 Å. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Na(3), one Na(4), one Na(6), and one As(4) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Na(5), and one As(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Na(5), and one As(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Na(3), one Na(4), one Na(6), and one As(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(5) and one Te(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Na(1) and one Te(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Na(6) and one Te(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Na(6) and one Te(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Na(2) and one Te(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Na(3) and one Te(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Na(4) and one Te(2) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Na(5) and one Te(1) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Na(4) and one Te(2) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Na(2) and one Te(1) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Na(3) and one Te(2) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one Te(1) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 120 degrees geometry to one Na(2) and one As(1) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one Na(5) and one As(1) atom. In the nineteenth O site, O(19) is bonded in a distorted bent 150 degrees geometry to one Na(4) and one As(2) atom. In the twentieth O site, O(20) is bonded in a distorted bent 120 degrees geometry to one Na(3) and one As(3) atom. In the twenty-first O site, O(21) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one As(1) atom. In the twenty-second O site, O(22) is bonded in a distorted bent 150 degrees geometry to one Na(6) and one As(2) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 150 degrees geometry to one Na(6) and one As(3) atom. In the twenty-fourth O site, O(24) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one As(4) atom. In the twenty-fifth O site, O(25) is bonded in a distorted bent 120 degrees geometry to one Na(3) and one As(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted bent 120 degrees geometry to one Na(5) and one As(4) atom. In the twenty-seventh O site, O(27) is bonded in a distorted bent 150 degrees geometry to one Na(4) and one As(3) atom. In the twenty-eighth O site, O(28) is bonded in a distorted bent 150 degrees geometry to one Na(2) and one As(4) atom.