CaTa2O6 crystallizes in the cubic Fm-3m space group. Ca(1) is bonded to twelve equivalent O(1) atoms to form CaO12 cuboctahedra that share corners with twelve equivalent Ca(1)O12 cuboctahedra and faces with eight equivalent Ta(1)O6 octahedra. Ta(1) is bonded to six equivalent O(1) atoms to form TaO6 octahedra that share corners with six equivalent Ta(1)O6 octahedra and faces with four equivalent Ca(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. O(1) is bonded in a distorted linear geometry to two equivalent Ca(1) and two equivalent Ta(1) atoms.
CaTa2O6 crystallizes in the cubic Fm-3m space group. Ca(1) is bonded to twelve equivalent O(1) atoms to form CaO12 cuboctahedra that share corners with twelve equivalent Ca(1)O12 cuboctahedra and faces with eight equivalent Ta(1)O6 octahedra. All Ca(1)-O(1) bond lengths are 2.80 Å. Ta(1) is bonded to six equivalent O(1) atoms to form TaO6 octahedra that share corners with six equivalent Ta(1)O6 octahedra and faces with four equivalent Ca(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. All Ta(1)-O(1) bond lengths are 1.98 Å. O(1) is bonded in a distorted linear geometry to two equivalent Ca(1) and two equivalent Ta(1) atoms.