Ho3Se4O12F crystallizes in the hexagonal P6_3mc space group. Ho(1) is bonded in a 9-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and one F(1) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(3) and two equivalent O(1) atoms. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to three equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to two equivalent Ho(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Se(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ho(1) and one Se(1) atom. F(1) is bonded in a trigonal planar geometry to three equivalent Ho(1) atoms.
Ho3Se4O12F crystallizes in the hexagonal P6_3mc space group. Ho(1) is bonded in a 9-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and one F(1) atom. There is one shorter (2.33 Å) and one longer (2.47 Å) Ho(1)-O(2) bond length. Both Ho(1)-O(3) bond lengths are 2.56 Å. There are two shorter (2.34 Å) and two longer (2.44 Å) Ho(1)-O(1) bond lengths. The Ho(1)-F(1) bond length is 2.35 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(3) and two equivalent O(1) atoms. The Se(1)-O(3) bond length is 1.72 Å. Both Se(1)-O(1) bond lengths are 1.72 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to three equivalent O(2) atoms. All Se(2)-O(2) bond lengths are 1.74 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to two equivalent Ho(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Se(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ho(1) and one Se(1) atom. F(1) is bonded in a trigonal planar geometry to three equivalent Ho(1) atoms.