MgSnBiO4 crystallizes in the tetragonal I-4m2 space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent Bi(1)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Sn(1)O6 octahedra, and edges with four equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. Sn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form SnO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. Bi(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form BiO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Bi(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), one Sn(1), and two equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OMg2SnBi2 square pyramids. In the second O site, O(2) is bonded in a square co-planar geometry to one Mg(1), two equivalent Sn(1), and one Bi(1) atom.
MgSnBiO4 crystallizes in the tetragonal I-4m2 space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent Bi(1)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Sn(1)O6 octahedra, and edges with four equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. Both Mg(1)-O(2) bond lengths are 2.15 Å. All Mg(1)-O(1) bond lengths are 2.34 Å. Sn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form SnO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. Both Sn(1)-O(1) bond lengths are 2.23 Å. All Sn(1)-O(2) bond lengths are 2.35 Å. Bi(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form BiO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Bi(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. Both Bi(1)-O(2) bond lengths are 2.50 Å. All Bi(1)-O(1) bond lengths are 2.34 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), one Sn(1), and two equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OMg2SnBi2 square pyramids. In the second O site, O(2) is bonded in a square co-planar geometry to one Mg(1), two equivalent Sn(1), and one Bi(1) atom.