Materials Data on NaLaS2 by Materials Project

Abstract

NaLaS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Na1+ is bonded to six equivalent S2- atoms to form NaS6 octahedra that share corners with six equivalent LaS6 octahedra, edges with six equivalent NaS6 octahedra, and edges with six equivalent LaS6 octahedra. The corner-sharing octahedral tilt angles are 3°. All Na–S bond lengths are 3.01 Å. La3+ is bonded to six equivalent S2- atoms to form LaS6 octahedra that share corners with six equivalent NaS6 octahedra, edges with six equivalent NaS6 octahedra, and edges with six equivalent LaS6 octahedra. The corner-sharing octahedral tilt angles are 3°. All La–S bond lengths are 2.90 Å. S2- is bonded to three equivalent Na1+ and three equivalent La3+ atoms to form a mixture of edge and corner-sharing SNa3La3 octahedra. The corner-sharing octahedral tilt angles are 0°.