Hg3Te2SeO10 crystallizes in the monoclinic P2_1 space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 2-coordinate geometry to one O(10), one O(8), and one O(9) atom. In the second Hg site, Hg(2) is bonded in a 4-coordinate geometry to one O(4), one O(5), and two equivalent O(2) atoms. In the third Hg site, Hg(3) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(9), and two equivalent O(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one O(10), one O(2), and one O(4) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(1), one O(5), and one O(9) atom. Se(1) is bonded in a tetrahedral geometry to one O(3), one O(6), one O(7), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Hg(3) and one Te(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Hg(2) and one Te(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Hg(2), one Hg(3), and one Te(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Hg(2), one Hg(3), and one Te(2) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Hg(3) and one Se(1) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Se(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Hg(1) and one Se(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Hg(1), one Hg(3), and one Te(2) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Hg(1) and one Te(1) atom.
Hg3Te2SeO10 crystallizes in the monoclinic P2_1 space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 2-coordinate geometry to one O(10), one O(8), and one O(9) atom. The Hg(1)-O(10) bond length is 2.10 Å. The Hg(1)-O(8) bond length is 2.59 Å. The Hg(1)-O(9) bond length is 2.12 Å. In the second Hg site, Hg(2) is bonded in a 4-coordinate geometry to one O(4), one O(5), and two equivalent O(2) atoms. The Hg(2)-O(4) bond length is 2.46 Å. The Hg(2)-O(5) bond length is 2.27 Å. There is one shorter (2.24 Å) and one longer (2.36 Å) Hg(2)-O(2) bond length. In the third Hg site, Hg(3) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(9), and two equivalent O(1) atoms. The Hg(3)-O(4) bond length is 2.30 Å. The Hg(3)-O(5) bond length is 2.35 Å. The Hg(3)-O(6) bond length is 2.69 Å. The Hg(3)-O(9) bond length is 2.56 Å. There is one shorter (2.37 Å) and one longer (2.41 Å) Hg(3)-O(1) bond length. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one O(10), one O(2), and one O(4) atom. The Te(1)-O(10) bond length is 1.90 Å. The Te(1)-O(2) bond length is 1.91 Å. The Te(1)-O(4) bond length is 1.94 Å. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(1), one O(5), and one O(9) atom. The Te(2)-O(1) bond length is 1.92 Å. The Te(2)-O(5) bond length is 1.91 Å. The Te(2)-O(9) bond length is 1.92 Å. Se(1) is bonded in a tetrahedral geometry to one O(3), one O(6), one O(7), and one O(8) atom. The Se(1)-O(3) bond length is 1.67 Å. The Se(1)-O(6) bond length is 1.69 Å. The Se(1)-O(7) bond length is 1.70 Å. The Se(1)-O(8) bond length is 1.69 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Hg(3) and one Te(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Hg(2) and one Te(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Hg(2), one Hg(3), and one Te(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Hg(2), one Hg(3), and one Te(2) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Hg(3) and one Se(1) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Se(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Hg(1) and one Se(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Hg(1), one Hg(3), and one Te(2) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Hg(1) and one Te(1) atom.