MgHo(SnO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(3) atoms. Ho(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. Sn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 43-49°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Ho(1), and two equivalent Sn(1) atoms to form distorted corner-sharing OHoMgSn2 trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ho(1) and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Ho(1), and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Ho(1), and two equivalent Sn(1) atoms to form distorted corner-sharing OHoMgSn2 trigonal pyramids.
MgHo(SnO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(3) atoms. The Mg(1)-O(1) bond length is 2.34 Å. The Mg(1)-O(4) bond length is 2.03 Å. Both Mg(1)-O(3) bond lengths are 2.12 Å. Ho(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. The Ho(1)-O(1) bond length is 2.28 Å. The Ho(1)-O(4) bond length is 2.28 Å. Both Ho(1)-O(2) bond lengths are 2.21 Å. There are two shorter (2.58 Å) and two longer (2.95 Å) Ho(1)-O(3) bond lengths. Sn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 43-49°. The Sn(1)-O(1) bond length is 2.20 Å. The Sn(1)-O(4) bond length is 2.23 Å. There is one shorter (2.10 Å) and one longer (2.12 Å) Sn(1)-O(2) bond length. There is one shorter (2.15 Å) and one longer (2.22 Å) Sn(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Ho(1), and two equivalent Sn(1) atoms to form distorted corner-sharing OHoMgSn2 trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ho(1) and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Ho(1), and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Ho(1), and two equivalent Sn(1) atoms to form distorted corner-sharing OHoMgSn2 trigonal pyramids.