Materials Data on Cd3Pb2Se4(IO6)2 by Materials Project

Abstract

Cd3Pb2Se4(O6I)2 crystallizes in the monoclinic P2/c space group. The structure is three-dimensional. there are two inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cd–O bond distances ranging from 2.30–2.71 Å. In the second Cd2+ site, Cd2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cd–O bond distances ranging from 2.30–2.86 Å. Pb2+ is bonded in a 7-coordinate geometry to four O2- and three equivalent I1- atoms. There are a spread of Pb–O bond distances ranging from 2.46–2.64 Å. There are a spread of Pb–I bond distances ranging from 3.47–3.54 Å. There are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.72–1.76 Å. In the second 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 1.70–1.79 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to two Cd2+, one Pb2+, and one Se4+ atom to form distorted corner-sharing OCd2PbSe tetrahedra. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Cd2+, one Pb2+, one Se4+, and one I1- atom. The O–I bond length is 3.79 Å. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two Cd2+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Cd2+ and one Se4+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Cd2+, one Pb2+, one Se4+, and one I1- atom. The O–I bond length is 3.78 Å. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Cd2+, one Pb2+, and one Se4+ atom. I1- is bonded in a 3-coordinate geometry to three equivalent Pb2+ and two O2- atoms.