Materials Data on Ce4(YS2)11 by Materials Project

Abstract

Ce4(YS2)11 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. 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 2.92–3.06 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 2.90–3.43 Å. There are six inequivalent Y sites. In the first Y site, Y is bonded to seven S atoms to form distorted YS7 pentagonal bipyramids that share corners with three YS6 octahedra, edges with two equivalent YS6 octahedra, and edges with four equivalent YS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 40–50°. There are a spread of Y–S bond distances ranging from 2.70–2.89 Å. In the second Y site, Y is bonded to six S atoms to form a mixture of edge and corner-sharing YS6 octahedra. The corner-sharing octahedra tilt angles range from 48–59°. There are a spread of Y–S bond distances ranging from 2.65–2.79 Å. In the third Y site, Y is bonded to six S atoms to form YS6 octahedra that share corners with three equivalent YS6 octahedra, corners with two equivalent YS7 pentagonal bipyramids, and edges with four YS6 octahedra. The corner-sharing octahedra tilt angles range from 50–63°. There are a spread of Y–S bond distances ranging from 2.66–2.80 Å. In the fourth Y site, Y is bonded to six S atoms to form YS6 octahedra that share corners with three equivalent YS6 octahedra, a cornercorner with one YS7 pentagonal bipyramid, edges with four equivalent YS6 octahedra, and edges with two equivalent YS7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 50–63°. There are a spread of Y–S bond distances ranging from 2.66–2.78 Å. In the fifth Y site, Y is bonded to six S atoms to form a mixture of edge and corner-sharing YS6 octahedra. The corner-sharing octahedra tilt angles range from 48–59°. There are a spread of Y–S bond distances ranging from 2.66–2.78 Å. In the sixth Y site, Y is bonded to six S atoms to form a mixture of edge and corner-sharing YS6 octahedra. The corner-sharing octahedral tilt angles are 55°. All Y–S bond lengths are 2.75 Å. There are eleven inequivalent S sites. In the first S site, S is bonded to two equivalent Ce and three Y atoms to form SCe2Y3 trigonal bipyramids that share corners with two equivalent SCe2Y3 square pyramids, corners with two equivalent SCe3Y2 trigonal bipyramids, corners with two SCeY3 trigonal pyramids, an edgeedge with one SCe2Y3 square pyramid, edges with five SCe2Y3 trigonal bipyramids, and edges with two equivalent SY4 trigonal pyramids. In the second S site, S is bonded in a rectangular see-saw-like geometry to four Y atoms. In the third S site, S is bonded in a 4-coordinate geometry to one Ce and three Y atoms. In the fourth S site, S is bonded to two equivalent Ce and three Y atoms to form SCe2Y3 square pyramids that share corners with six SCe2Y3 trigonal bipyramids, corners with two equivalent SCeY3 trigonal pyramids, edges with four SCe2Y3 square pyramids, edges with two SCe2Y3 trigonal bipyramids, and an edgeedge with one SCeY3 trigonal pyramid. In the fifth S site, S is bonded to two equivalent Ce and three Y atoms to form SCe2Y3 square pyramids that share corners with two equivalent SCe2Y3 square pyramids, corners with four SCe3Y2 trigonal bipyramids, edges with five SCe2Y3 square pyramids, an edgeedge with one SCe3Y2 trigonal bipyramid, and edges with two equivalent SCeY3 trigonal pyramids. In the sixth S site, S is bonded to two equivalent Ce and three Y atoms to form SCe2Y3 square pyramids that share corners with four SCe2Y3 square pyramids, corners with two equivalent SCe3Y2 trigonal bipyramids, corners with two equivalent SCeY3 trigonal pyramids, edges with four SCe2Y3 square pyramids, and edges with three SCe3Y2 trigonal bipyramids. In the seventh S site, S is bonded to three Ce and two equivalent Y atoms to form distorted SCe3Y2 trigonal bipyramids that share corners with six SCe2Y3 square pyramids, corners with four equivalent SY4 trigonal pyramids, edges with two SCe2Y3 square pyramids, edges with six SCe2Y3 trigonal bipyramids, and edges with three SCeY3 trigonal pyramids. In the eighth S site, S is bonded to one Ce and three Y atoms to form SCeY3 trigonal pyramids that share corners with four SCe2Y3 square pyramids, corners with two SCe2Y3 trigonal bipyramids, corners with five SCeY3 trigonal pyramids, edges with three SCe2Y3 square pyramids, and edges with two equivalent SCe3Y2 trigonal bipyramids. In the ninth S site, S is bonded in a rectangular see-saw-like geometry to four Y atoms. In the tenth S site, S is bonded to four Y atoms to form distorted SY4 trigonal pyramids that share corners with five SCe2Y3 trigonal bipyramids, corners with five SCeY3 trigonal pyramids, edges with three SCe2Y3 trigonal bipyramids, and edges with two equivalent SY4 trigonal pyramids. In the eleventh S site, S is bonded to three Ce and two equivalent Y atoms to form distorted SCe3Y2 trigonal bipyramids that share corners with four SCe2Y3 square pyramids, corners with two equivalent SCe2Y3 trigonal bipyramids, a cornercorner with one SCeY3 trigonal pyramid, edges with three SCe2Y3 square pyramids, and edges with five SCe2Y3 trigonal bipyramids.