Bi2Te2SeO10 crystallizes in the monoclinic C2/c space group. Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms. Te(1) is bonded in a 3-coordinate geometry to one O(3), one O(4), and one O(5) atom. Se(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are five inequivalent O sites. In the first O site, O(4) is bonded in a 2-coordinate geometry to one Bi(1) and one Te(1) atom. In the second O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Bi(1) and one Te(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Bi(1) and one Se(1) atom. In the fourth O site, O(2) is bonded in a 2-coordinate geometry to one Bi(1) and one Se(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Bi(1) and one Te(1) atom.
Bi2Te2SeO10 crystallizes in the monoclinic C2/c space group. Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms. The Bi(1)-O(1) bond length is 2.69 Å. The Bi(1)-O(2) bond length is 2.56 Å. The Bi(1)-O(3) bond length is 2.25 Å. The Bi(1)-O(4) bond length is 2.25 Å. There is one shorter (2.25 Å) and one longer (2.66 Å) Bi(1)-O(5) bond length. Te(1) is bonded in a 3-coordinate geometry to one O(3), one O(4), and one O(5) atom. The Te(1)-O(3) bond length is 1.89 Å. The Te(1)-O(4) bond length is 1.92 Å. The Te(1)-O(5) bond length is 1.93 Å. Se(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Se(1)-O(1) bond lengths are 1.68 Å. Both Se(1)-O(2) bond lengths are 1.68 Å. There are five inequivalent O sites. In the first O site, O(4) is bonded in a 2-coordinate geometry to one Bi(1) and one Te(1) atom. In the second O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Bi(1) and one Te(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Bi(1) and one Se(1) atom. In the fourth O site, O(2) is bonded in a 2-coordinate geometry to one Bi(1) and one Se(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Bi(1) and one Te(1) atom.