MgHo(NiO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), 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. Ni(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 35-42°. 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 Ni(1) atoms to form distorted corner-sharing OHoMgNi2 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Ho(1), and two equivalent Ni(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 Ni(1) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Ho(1), and two equivalent Ni(1) atoms to form distorted corner-sharing OHoMgNi2 trigonal pyramids.
MgHo(NiO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. The Mg(1)-O(1) bond length is 2.13 Å. The Mg(1)-O(4) bond length is 2.08 Å. Both Mg(1)-O(2) bond lengths are 2.24 Å. Both Mg(1)-O(3) bond lengths are 2.16 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 2.22 Å. The Ho(1)-O(4) bond length is 2.27 Å. Both Ho(1)-O(2) bond lengths are 2.27 Å. There are two shorter (2.41 Å) and two longer (2.57 Å) Ho(1)-O(3) bond lengths. Ni(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 35-42°. The Ni(1)-O(1) bond length is 1.94 Å. The Ni(1)-O(4) bond length is 1.97 Å. Both Ni(1)-O(2) bond lengths are 1.93 Å. There is one shorter (1.97 Å) and one longer (2.00 Å) Ni(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 Ni(1) atoms to form distorted corner-sharing OHoMgNi2 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Ho(1), and two equivalent Ni(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 Ni(1) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Ho(1), and two equivalent Ni(1) atoms to form distorted corner-sharing OHoMgNi2 trigonal pyramids.