MgHo2(BiO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(6), one O(8), and one O(9) atom. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(6), one O(8), and one O(9) atom. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(10), one O(12), one O(2), one O(4), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. In the second Bi site, Bi(2) is bonded to one O(1), one O(11), one O(12), one O(3), one O(5), and one O(8) atom to form corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. In the third Bi site, Bi(3) is bonded to one O(11), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. In the fourth Bi site, Bi(4) is bonded to one O(10), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ho(1), one Bi(3), and one Bi(4) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(2), and one Bi(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(4) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(1), and one Bi(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(2), and one Bi(3) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Ho(1), one Bi(1), and one Bi(2) atom.
MgHo2(BiO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(6), one O(8), and one O(9) atom. The Mg(1)-O(1) bond length is 1.90 Å. The Mg(1)-O(6) bond length is 1.89 Å. The Mg(1)-O(8) bond length is 2.11 Å. The Mg(1)-O(9) bond length is 2.11 Å. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. The Ho(1)-O(12) bond length is 2.25 Å. The Ho(1)-O(2) bond length is 2.32 Å. The Ho(1)-O(3) bond length is 2.34 Å. The Ho(1)-O(4) bond length is 2.31 Å. The Ho(1)-O(5) bond length is 2.32 Å. The Ho(1)-O(7) bond length is 2.26 Å. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(6), one O(8), and one O(9) atom. The Ho(2)-O(1) bond length is 2.26 Å. The Ho(2)-O(10) bond length is 2.26 Å. The Ho(2)-O(11) bond length is 2.26 Å. The Ho(2)-O(6) bond length is 2.15 Å. The Ho(2)-O(8) bond length is 2.54 Å. The Ho(2)-O(9) bond length is 2.55 Å. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(10), one O(12), one O(2), one O(4), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. The Bi(1)-O(1) bond length is 2.53 Å. The Bi(1)-O(10) bond length is 2.49 Å. The Bi(1)-O(12) bond length is 2.19 Å. The Bi(1)-O(2) bond length is 2.32 Å. The Bi(1)-O(4) bond length is 2.24 Å. The Bi(1)-O(9) bond length is 2.62 Å. In the second Bi site, Bi(2) is bonded to one O(1), one O(11), one O(12), one O(3), one O(5), and one O(8) atom to form corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. The Bi(2)-O(1) bond length is 2.48 Å. The Bi(2)-O(11) bond length is 2.48 Å. The Bi(2)-O(12) bond length is 2.21 Å. The Bi(2)-O(3) bond length is 2.32 Å. The Bi(2)-O(5) bond length is 2.24 Å. The Bi(2)-O(8) bond length is 2.61 Å. In the third Bi site, Bi(3) is bonded to one O(11), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. The Bi(3)-O(11) bond length is 2.13 Å. The Bi(3)-O(3) bond length is 2.18 Å. The Bi(3)-O(5) bond length is 2.12 Å. The Bi(3)-O(6) bond length is 2.49 Å. The Bi(3)-O(7) bond length is 2.19 Å. The Bi(3)-O(8) bond length is 2.15 Å. In the fourth Bi site, Bi(4) is bonded to one O(10), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. The Bi(4)-O(10) bond length is 2.14 Å. The Bi(4)-O(2) bond length is 2.18 Å. The Bi(4)-O(4) bond length is 2.12 Å. The Bi(4)-O(6) bond length is 2.42 Å. The Bi(4)-O(7) bond length is 2.21 Å. The Bi(4)-O(9) bond length is 2.15 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ho(1), one Bi(3), and one Bi(4) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(2), and one Bi(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(4) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(1), and one Bi(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(2), and one Bi(3) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Ho(1), one Bi(1), and one Bi(2) atom.