Ho2(SeO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a pentagonal bipyramidal geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the second Ho site, Ho(2) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(8), and two equivalent O(9) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(3), and one O(4) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(7), one O(8), and one O(9) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ho(2) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ho(1) and one Se(3) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ho(1), one Ho(2), and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ho(1), one Ho(2), and one Se(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Ho(1), one Ho(2), and one Se(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(2), and one Se(3) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ho(1) and one Se(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(2), and one Se(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to two equivalent Ho(2) and one Se(2) atom.
Ho2(SeO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a pentagonal bipyramidal geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Ho(1)-O(2) bond length is 2.17 Å. The Ho(1)-O(3) bond length is 2.44 Å. The Ho(1)-O(4) bond length is 2.34 Å. The Ho(1)-O(5) bond length is 2.27 Å. The Ho(1)-O(6) bond length is 2.30 Å. The Ho(1)-O(7) bond length is 2.29 Å. The Ho(1)-O(8) bond length is 2.33 Å. In the second Ho site, Ho(2) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(8), and two equivalent O(9) atoms. The Ho(2)-O(1) bond length is 2.27 Å. The Ho(2)-O(3) bond length is 2.31 Å. The Ho(2)-O(4) bond length is 2.24 Å. The Ho(2)-O(5) bond length is 2.35 Å. The Ho(2)-O(6) bond length is 2.50 Å. The Ho(2)-O(8) bond length is 2.57 Å. There is one shorter (2.31 Å) and one longer (2.42 Å) Ho(2)-O(9) bond length. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(3), and one O(4) atom. The Se(1)-O(1) bond length is 1.67 Å. The Se(1)-O(3) bond length is 1.73 Å. The Se(1)-O(4) bond length is 1.72 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(7), one O(8), and one O(9) atom. The Se(2)-O(7) bond length is 1.68 Å. The Se(2)-O(8) bond length is 1.72 Å. The Se(2)-O(9) bond length is 1.72 Å. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. The Se(3)-O(2) bond length is 1.67 Å. The Se(3)-O(5) bond length is 1.72 Å. The Se(3)-O(6) bond length is 1.72 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ho(2) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ho(1) and one Se(3) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ho(1), one Ho(2), and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ho(1), one Ho(2), and one Se(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Ho(1), one Ho(2), and one Se(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(2), and one Se(3) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ho(1) and one Se(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(2), and one Se(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to two equivalent Ho(2) and one Se(2) atom.