Na8Ta7VO24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. Na(1) is bonded to three equivalent O(1), three equivalent O(3), and six equivalent O(2) atoms to form NaO12 cuboctahedra that share corners with twelve equivalent Na(1)O12 cuboctahedra, faces with six equivalent Na(1)O12 cuboctahedra,  a faceface with one Ta(3)O6 octahedra,  a faceface with one V(1)O6 octahedra, faces with three equivalent Ta(1)O6 octahedra, and faces with three equivalent Ta(2)O6 octahedra. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with two equivalent V(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the second Ta site, Ta(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with two equivalent Ta(3)O6 octahedra, corners with four equivalent Ta(1)O6 octahedra, and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the third Ta site, Ta(3) is bonded to six equivalent O(3) atoms to form TaO6 octahedra that share corners with six equivalent Ta(2)O6 octahedra and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. V(1) is bonded to six equivalent O(1) atoms to form VO6 octahedra that share corners with six equivalent Ta(1)O6 octahedra and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Na(1), one Ta(1), and one V(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Na(1), one Ta(1), and one Ta(2) atom. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent Na(1), one Ta(2), and one Ta(3) atom.
Na8Ta7VO24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. Na(1) is bonded to three equivalent O(1), three equivalent O(3), and six equivalent O(2) atoms to form NaO12 cuboctahedra that share corners with twelve equivalent Na(1)O12 cuboctahedra, faces with six equivalent Na(1)O12 cuboctahedra,  a faceface with one Ta(3)O6 octahedra,  a faceface with one V(1)O6 octahedra, faces with three equivalent Ta(1)O6 octahedra, and faces with three equivalent Ta(2)O6 octahedra. All Na(1)-O(1) bond lengths are 2.78 Å. All Na(1)-O(3) bond lengths are 2.82 Å. All Na(1)-O(2) bond lengths are 2.80 Å. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with two equivalent V(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. Both Ta(1)-O(1) bond lengths are 2.03 Å. All Ta(1)-O(2) bond lengths are 1.98 Å. In the second Ta site, Ta(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with two equivalent Ta(3)O6 octahedra, corners with four equivalent Ta(1)O6 octahedra, and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. Both Ta(2)-O(3) bond lengths are 1.98 Å. All Ta(2)-O(2) bond lengths are 1.98 Å. In the third Ta site, Ta(3) is bonded to six equivalent O(3) atoms to form TaO6 octahedra that share corners with six equivalent Ta(2)O6 octahedra and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. All Ta(3)-O(3) bond lengths are 1.98 Å. V(1) is bonded to six equivalent O(1) atoms to form VO6 octahedra that share corners with six equivalent Ta(1)O6 octahedra and faces with eight equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. All V(1)-O(1) bond lengths are 1.93 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Na(1), one Ta(1), and one V(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Na(1), one Ta(1), and one Ta(2) atom. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent Na(1), one Ta(2), and one Ta(3) atom.