Materials Data on K6Na2Pt(WO6)6 by Materials Project

Abstract

K6Na2Pt(WO6)6 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. K is bonded in a 6-coordinate geometry to eight O atoms. There are a spread of K–O bond distances ranging from 2.74–3.22 Å. Na is bonded in a 4-coordinate geometry to three equivalent O atoms. All Na–O bond lengths are 2.45 Å. W is bonded to six O atoms to form distorted WO6 octahedra that share an edgeedge with one PtO6 octahedra and edges with two equivalent WO6 octahedra. There are a spread of W–O bond distances ranging from 1.82–2.18 Å. Pt is bonded to six equivalent O atoms to form PtO6 octahedra that share edges with six equivalent WO6 octahedra. All Pt–O bond lengths are 2.04 Å. There are five inequivalent O sites. In the first O site, O is bonded in a distorted water-like geometry to two equivalent K and two equivalent O atoms. Both O–O bond lengths are 1.46 Å. In the second O site, O is bonded in a see-saw-like geometry to one K, one Na, and two equivalent O atoms. In the third O site, O is bonded in a water-like geometry to two equivalent W atoms. In the fourth O site, O is bonded to one K, two equivalent W, and one Pt atom to form a mixture of distorted corner and edge-sharing OKPtW2 trigonal pyramids. In the fifth O site, O is bonded in a 3-coordinate geometry to two equivalent K and one W atom.