MgTiZn(BiO3)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in an L-shaped geometry to two equivalent O(1) atoms. Ti(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form TiO4 tetrahedra that share corners with six equivalent Bi(1)O5 square pyramids and corners with two equivalent Zn(1)O4 tetrahedra. Zn(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with six equivalent Bi(1)O5 square pyramids and corners with two equivalent Ti(1)O4 tetrahedra. Bi(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted BiO5 square pyramids that share corners with three equivalent Ti(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Bi(1)O5 square pyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Zn(1), and two equivalent Bi(1) atoms to form distorted edge-sharing OMgZnBi2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ti(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ti(1), one Zn(1), and one Bi(1) atom.
MgTiZn(BiO3)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in an L-shaped geometry to two equivalent O(1) atoms. Both Mg(1)-O(1) bond lengths are 1.96 Å. Ti(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form TiO4 tetrahedra that share corners with six equivalent Bi(1)O5 square pyramids and corners with two equivalent Zn(1)O4 tetrahedra. Both Ti(1)-O(2) bond lengths are 1.82 Å. Both Ti(1)-O(3) bond lengths are 1.88 Å. Zn(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with six equivalent Bi(1)O5 square pyramids and corners with two equivalent Ti(1)O4 tetrahedra. Both Zn(1)-O(1) bond lengths are 2.09 Å. Both Zn(1)-O(3) bond lengths are 2.01 Å. Bi(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted BiO5 square pyramids that share corners with three equivalent Ti(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Bi(1)O5 square pyramids. The Bi(1)-O(3) bond length is 2.48 Å. Both Bi(1)-O(1) bond lengths are 2.36 Å. Both Bi(1)-O(2) bond lengths are 2.40 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Zn(1), and two equivalent Bi(1) atoms to form distorted edge-sharing OMgZnBi2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ti(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ti(1), one Zn(1), and one Bi(1) atom.