Materials Data on Cu2SiS3 by Materials Project

Abstract

Cu2SiS3 is Enargite-like structured and crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. Cu1+ is bonded to four S2- atoms to form CuS4 tetrahedra that share corners with five equivalent SiS4 tetrahedra and corners with seven equivalent CuS4 tetrahedra. There are a spread of Cu–S bond distances ranging from 2.28–2.33 Å. Si4+ is bonded to four S2- atoms to form SiS4 tetrahedra that share corners with two equivalent SiS4 tetrahedra and corners with ten equivalent CuS4 tetrahedra. There are a spread of Si–S bond distances ranging from 2.11–2.27 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded to three equivalent Cu1+ and one Si4+ atom to form corner-sharing SCu3Si tetrahedra. In the second S2- site, S2- is bonded to two equivalent Cu1+ and two equivalent Si4+ atoms to form corner-sharing SCu2Si2 tetrahedra.