ZnSnBiO5 crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted ZnO5 trigonal bipyramids that share corners with three equivalent Bi(1)O6 pentagonal pyramids, corners with three equivalent Sn(1)O5 trigonal bipyramids, edges with two equivalent Bi(1)O6 pentagonal pyramids, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. Sn(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(1) atoms to form SnO5 trigonal bipyramids that share  a cornercorner with one Bi(1)O6 pentagonal pyramid, corners with three equivalent Zn(1)O5 trigonal bipyramids, edges with two equivalent Bi(1)O6 pentagonal pyramids, and  an edgeedge with one Sn(1)O5 trigonal bipyramid. Bi(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted BiO6 pentagonal pyramids that share  a cornercorner with one Sn(1)O5 trigonal bipyramid, corners with three equivalent Zn(1)O5 trigonal bipyramids,  an edgeedge with one Bi(1)O6 pentagonal pyramid, edges with two equivalent Zn(1)O5 trigonal bipyramids, and edges with two equivalent Sn(1)O5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to two equivalent Sn(1) and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one Sn(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Zn(1), one Sn(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded to two equivalent Zn(1) and two equivalent Bi(1) atoms to form distorted edge-sharing OZn2Bi2 trigonal pyramids. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Zn(1), one Sn(1), and one Bi(1) atom.
ZnSnBiO5 crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted ZnO5 trigonal bipyramids that share corners with three equivalent Bi(1)O6 pentagonal pyramids, corners with three equivalent Sn(1)O5 trigonal bipyramids, edges with two equivalent Bi(1)O6 pentagonal pyramids, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. The Zn(1)-O(2) bond length is 2.05 Å. The Zn(1)-O(3) bond length is 2.01 Å. The Zn(1)-O(5) bond length is 2.02 Å. There is one shorter (2.05 Å) and one longer (2.40 Å) Zn(1)-O(4) bond length. Sn(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(1) atoms to form SnO5 trigonal bipyramids that share  a cornercorner with one Bi(1)O6 pentagonal pyramid, corners with three equivalent Zn(1)O5 trigonal bipyramids, edges with two equivalent Bi(1)O6 pentagonal pyramids, and  an edgeedge with one Sn(1)O5 trigonal bipyramid. The Sn(1)-O(2) bond length is 2.02 Å. The Sn(1)-O(3) bond length is 2.05 Å. The Sn(1)-O(5) bond length is 2.03 Å. There is one shorter (2.04 Å) and one longer (2.19 Å) Sn(1)-O(1) bond length. Bi(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted BiO6 pentagonal pyramids that share  a cornercorner with one Sn(1)O5 trigonal bipyramid, corners with three equivalent Zn(1)O5 trigonal bipyramids,  an edgeedge with one Bi(1)O6 pentagonal pyramid, edges with two equivalent Zn(1)O5 trigonal bipyramids, and edges with two equivalent Sn(1)O5 trigonal bipyramids. The Bi(1)-O(1) bond length is 2.28 Å. The Bi(1)-O(2) bond length is 2.34 Å. The Bi(1)-O(3) bond length is 2.24 Å. The Bi(1)-O(5) bond length is 2.27 Å. There is one shorter (2.23 Å) and one longer (2.24 Å) Bi(1)-O(4) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to two equivalent Sn(1) and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one Sn(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Zn(1), one Sn(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded to two equivalent Zn(1) and two equivalent Bi(1) atoms to form distorted edge-sharing OZn2Bi2 trigonal pyramids. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Zn(1), one Sn(1), and one Bi(1) atom.