KCo2H3(SeO5)2 crystallizes in the triclinic P1 space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), one O(8), and one O(9) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Se(1)O4 tetrahedra, corners with two equivalent Se(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Se(1)O4 tetrahedra, corners with two equivalent Se(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a linear geometry to one O(5) and one O(6) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(1), one O(3), one O(7), and one O(8) atom to form SeO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. In the second Se site, Se(2) is bonded to one O(10), one O(2), one O(4), and one O(9) atom to form SeO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one Co(1), one Co(2), and one Se(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Co(1), one Co(2), and one Se(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one K(1) and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted tetrahedral geometry to one Co(1), one Co(2), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Co(1), one Co(2), one H(2), and one H(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one K(1), one Co(2), and one Se(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one K(1), one Co(1), and one Se(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one K(1), one Co(2), and one Se(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one K(1), one Co(1), and one Se(2) atom.
KCo2H3(SeO5)2 crystallizes in the triclinic P1 space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), one O(8), and one O(9) atom. The K(1)-O(1) bond length is 2.91 Å. The K(1)-O(10) bond length is 2.74 Å. The K(1)-O(2) bond length is 2.91 Å. The K(1)-O(3) bond length is 2.76 Å. The K(1)-O(4) bond length is 2.75 Å. The K(1)-O(7) bond length is 2.74 Å. The K(1)-O(8) bond length is 2.74 Å. The K(1)-O(9) bond length is 2.73 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Se(1)O4 tetrahedra, corners with two equivalent Se(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. The Co(1)-O(1) bond length is 2.17 Å. The Co(1)-O(10) bond length is 2.03 Å. The Co(1)-O(2) bond length is 2.20 Å. The Co(1)-O(5) bond length is 2.00 Å. The Co(1)-O(6) bond length is 2.11 Å. The Co(1)-O(8) bond length is 2.03 Å. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Se(1)O4 tetrahedra, corners with two equivalent Se(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. The Co(2)-O(1) bond length is 2.18 Å. The Co(2)-O(2) bond length is 2.20 Å. The Co(2)-O(5) bond length is 2.00 Å. The Co(2)-O(6) bond length is 2.11 Å. The Co(2)-O(7) bond length is 2.03 Å. The Co(2)-O(9) bond length is 2.03 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.97 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.98 Å. In the third H site, H(3) is bonded in a linear geometry to one O(5) and one O(6) atom. The H(3)-O(5) bond length is 1.47 Å. The H(3)-O(6) bond length is 1.05 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(1), one O(3), one O(7), and one O(8) atom to form SeO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. The Se(1)-O(1) bond length is 1.69 Å. The Se(1)-O(3) bond length is 1.63 Å. The Se(1)-O(7) bond length is 1.66 Å. The Se(1)-O(8) bond length is 1.66 Å. In the second Se site, Se(2) is bonded to one O(10), one O(2), one O(4), and one O(9) atom to form SeO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. The Se(2)-O(10) bond length is 1.67 Å. The Se(2)-O(2) bond length is 1.69 Å. The Se(2)-O(4) bond length is 1.63 Å. The Se(2)-O(9) bond length is 1.67 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one Co(1), one Co(2), and one Se(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Co(1), one Co(2), and one Se(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one K(1) and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted tetrahedral geometry to one Co(1), one Co(2), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Co(1), one Co(2), one H(2), and one H(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one K(1), one Co(2), and one Se(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one K(1), one Co(1), and one Se(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one K(1), one Co(2), and one Se(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one K(1), one Co(1), and one Se(2) atom.