Materials Data on La3GaCoS7 by Materials Project

Abstract

La3CoGaS7 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. La3+ is bonded in a 7-coordinate geometry to eight S2- atoms. There are a spread of La–S bond distances ranging from 2.87–3.49 Å. Co2+ is bonded to six equivalent S2- atoms to form face-sharing CoS6 octahedra. There are three shorter (2.44 Å) and three longer (2.50 Å) Co–S bond lengths. Ga3+ is bonded in a tetrahedral geometry to four S2- atoms. There are one shorter (2.24 Å) and three longer (2.29 Å) Ga–S bond lengths. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to four equivalent La3+ and two equivalent Co2+ atoms. In the second S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent La3+ and one Ga3+ atom. In the third S2- site, S2- is bonded in a tetrahedral geometry to three equivalent La3+ and one Ga3+ atom.