MgTa4O12 crystallizes in the cubic Im-3 space group. Mg(1) is bonded to twelve equivalent O(1) atoms to form MgO12 cuboctahedra that share 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 two equivalent Mg(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 7°. O(1) is bonded in a distorted linear geometry to one Mg(1) and two equivalent Ta(1) atoms.
MgTa4O12 crystallizes in the cubic Im-3 space group. Mg(1) is bonded to twelve equivalent O(1) atoms to form MgO12 cuboctahedra that share faces with eight equivalent Ta(1)O6 octahedra. All Mg(1)-O(1) bond lengths are 2.70 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 two equivalent Mg(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 7°. All Ta(1)-O(1) bond lengths are 1.98 Å. O(1) is bonded in a distorted linear geometry to one Mg(1) and two equivalent Ta(1) atoms.