Materials Data on Ta9(CoS3)2 by Materials Project

Abstract

Ta9(CoS3)2 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. there are three inequivalent Ta sites. In the first Ta site, Ta is bonded to two equivalent Co and three S atoms to form a mixture of distorted edge and corner-sharing TaCo2S3 trigonal bipyramids. Both Ta–Co bond lengths are 2.44 Å. There are one shorter (2.39 Å) and two longer (2.52 Å) Ta–S bond lengths. In the second Ta site, Ta is bonded in a 5-coordinate geometry to two equivalent Co and three S atoms. Both Ta–Co bond lengths are 2.56 Å. There are one shorter (2.43 Å) and two longer (2.56 Å) Ta–S bond lengths. In the third Ta site, Ta is bonded in a 3-coordinate geometry to three S atoms. There are a spread of Ta–S bond distances ranging from 2.50–2.55 Å. Co is bonded in a 6-coordinate geometry to six Ta atoms. There are three inequivalent S sites. In the first S site, S is bonded in a distorted pentagonal planar geometry to five Ta atoms. In the second S site, S is bonded in a distorted rectangular see-saw-like geometry to four Ta atoms. In the third S site, S is bonded in a 4-coordinate geometry to four Ta atoms.