Materials Data on Ce4(TmS2)11 by Materials Project

Abstract

Ce4(TmS2)11 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are six inequivalent Tm sites. In the first Tm site, Tm is bonded to seven S atoms to form distorted TmS7 pentagonal bipyramids that share corners with three TmS6 octahedra, edges with two equivalent TmS6 octahedra, and edges with four equivalent TmS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 39–50°. There are a spread of Tm–S bond distances ranging from 2.68–2.87 Å. In the second Tm site, Tm is bonded to six S atoms to form a mixture of edge and corner-sharing TmS6 octahedra. The corner-sharing octahedra tilt angles range from 49–59°. There are a spread of Tm–S bond distances ranging from 2.63–2.76 Å. In the third Tm site, Tm is bonded to six S atoms to form TmS6 octahedra that share corners with three equivalent TmS6 octahedra, corners with two equivalent TmS7 pentagonal bipyramids, and edges with four TmS6 octahedra. The corner-sharing octahedra tilt angles range from 52–62°. There are a spread of Tm–S bond distances ranging from 2.64–2.77 Å. In the fourth Tm site, Tm is bonded to six S atoms to form TmS6 octahedra that share corners with three equivalent TmS6 octahedra, a cornercorner with one TmS7 pentagonal bipyramid, edges with four equivalent TmS6 octahedra, and edges with two equivalent TmS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 52–62°. There are a spread of Tm–S bond distances ranging from 2.65–2.75 Å. In the fifth Tm site, Tm is bonded to six S atoms to form a mixture of edge and corner-sharing TmS6 octahedra. The corner-sharing octahedra tilt angles range from 49–59°. There are a spread of Tm–S bond distances ranging from 2.64–2.76 Å. In the sixth Tm site, Tm is bonded to six S atoms to form a mixture of edge and corner-sharing TmS6 octahedra. The corner-sharing octahedral tilt angles are 55°. All Tm–S bond lengths are 2.72 Å. There are two inequivalent Ce sites. In the first Ce site, Ce is bonded in a 8-coordinate geometry to eight S atoms. There are a spread of Ce–S bond distances ranging from 2.90–3.03 Å. In the second Ce site, Ce is bonded in a 7-coordinate geometry to eight S atoms. There are a spread of Ce–S bond distances ranging from 2.88–3.45 Å. There are eleven inequivalent S sites. In the first S site, S is bonded to three Tm and two equivalent Ce atoms to form SCe2Tm3 trigonal bipyramids that share corners with two equivalent SCe2Tm3 square pyramids, corners with two equivalent SCe3Tm2 trigonal bipyramids, corners with two SCeTm3 trigonal pyramids, an edgeedge with one SCe2Tm3 square pyramid, edges with five SCe2Tm3 trigonal bipyramids, and edges with two equivalent STm4 trigonal pyramids. In the second S site, S is bonded in a rectangular see-saw-like geometry to four Tm atoms. In the third S site, S is bonded in a 4-coordinate geometry to three Tm and one Ce atom. In the fourth S site, S is bonded to three Tm and two equivalent Ce atoms to form SCe2Tm3 square pyramids that share corners with six SCe2Tm3 trigonal bipyramids, corners with two equivalent SCeTm3 trigonal pyramids, edges with four SCe2Tm3 square pyramids, edges with two SCe2Tm3 trigonal bipyramids, and an edgeedge with one SCeTm3 trigonal pyramid. In the fifth S site, S is bonded to three Tm and two equivalent Ce atoms to form SCe2Tm3 square pyramids that share corners with two equivalent SCe2Tm3 square pyramids, corners with four SCe3Tm2 trigonal bipyramids, edges with five SCe2Tm3 square pyramids, an edgeedge with one SCe3Tm2 trigonal bipyramid, and edges with two equivalent SCeTm3 trigonal pyramids. In the sixth S site, S is bonded to three Tm and two equivalent Ce atoms to form SCe2Tm3 square pyramids that share corners with four SCe2Tm3 square pyramids, corners with two equivalent SCe3Tm2 trigonal bipyramids, corners with two equivalent SCeTm3 trigonal pyramids, edges with four SCe2Tm3 square pyramids, and edges with three SCe3Tm2 trigonal bipyramids. In the seventh S site, S is bonded to two equivalent Tm and three Ce atoms to form distorted SCe3Tm2 trigonal bipyramids that share corners with six SCe2Tm3 square pyramids, corners with four equivalent STm4 trigonal pyramids, edges with two SCe2Tm3 square pyramids, edges with six SCe2Tm3 trigonal bipyramids, and edges with three SCeTm3 trigonal pyramids. In the eighth S site, S is bonded to three Tm and one Ce atom to form distorted SCeTm3 trigonal pyramids that share corners with four SCe2Tm3 square pyramids, corners with two SCe2Tm3 trigonal bipyramids, corners with five SCeTm3 trigonal pyramids, edges with three SCe2Tm3 square pyramids, and edges with two equivalent SCe3Tm2 trigonal bipyramids. In the ninth S site, S is bonded in a rectangular see-saw-like geometry to four Tm atoms. In the tenth S site, S is bonded to four Tm atoms to form distorted STm4 trigonal pyramids that share corners with five SCe2Tm3 trigonal bipyramids, corners with five SCeTm3 trigonal pyramids, edges with three SCe2Tm3 trigonal bipyramids, and edges with two equivalent STm4 trigonal pyramids. In the eleventh S site, S is bonded to two equivalent Tm and three Ce atoms to form distorted SCe3Tm2 trigonal bipyramids that share corners with four SCe2Tm3 square pyramids, corners with two equivalent SCe2Tm3 trigonal bipyramids, a cornercorner with one SCeTm3 trigonal pyramid, edges with three SCe2Tm3 square pyramids, and edges with five SCe2Tm3 trigonal bipyramids.