Materials Data on K2Zn3(SeO3)4 by Materials Project
K2Zn3(SeO3)4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.75–3.14 Å. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Zn–O bond distances ranging from 1.97–2.01 Å. In the second Zn2+ site, Zn2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Zn–O bond distances ranging from 2.07–2.46 Å. There are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.72–1.75 Å. In the second Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.73 Å) and two longer (1.74 Å) Se–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Zn2+, and one Se4+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Zn2+, and one Se4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one K1+, two Zn2+, and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one K1+, one Zn2+, and one Se4+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent K1+, one Zn2+, and one Se4+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Zn2+, and one Se4+ atom.