Materials Data on K2Co2(SeO3)3 by Materials Project
K2Co2(SeO3)3 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.04 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.95–2.98 Å. There are two inequivalent Co3+ sites. In the first Co3+ site, Co3+ is bonded to six O2- atoms to form face-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 2.09–2.21 Å. In the second Co3+ site, Co3+ is bonded to six O2- atoms to form face-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 2.05–2.22 Å. There are three inequivalent Se+3.33+ sites. In the first Se+3.33+ site, Se+3.33+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. All Se–O bond lengths are 1.74 Å. In the second Se+3.33+ site, Se+3.33+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. All Se–O bond lengths are 1.74 Å. In the third Se+3.33+ site, Se+3.33+ 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 2-coordinate geometry to three K1+, one Co3+, and one Se+3.33+ atom. In the second O2- site, O2- is bonded in a distorted T-shaped geometry to two Co3+ and one Se+3.33+ atom. In the third O2- site, O2- is bonded in a distorted T-shaped geometry to two Co3+ and one Se+3.33+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three K1+, one Co3+, and one Se+3.33+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to three K1+, one Co3+, and one Se+3.33+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to three K1+, one Co3+, and one Se+3.33+ atom.