Materials Data on SmSbTe3 by Materials Project

Abstract

SmSbTe3 is Calaverite-derived structured and crystallizes in the trigonal R3m space group. The structure is two-dimensional and consists of three SmSbTe3 sheets oriented in the (0, 0, 1) direction. Sm3+ is bonded to six Te2- atoms to form SmTe6 octahedra that share corners with three equivalent SbTe6 octahedra, edges with three equivalent SbTe6 octahedra, and edges with six equivalent SmTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are three shorter (3.06 Å) and three longer (3.25 Å) Sm–Te bond lengths. Sb3+ is bonded to six Te2- atoms to form SbTe6 octahedra that share corners with three equivalent SmTe6 octahedra, edges with three equivalent SmTe6 octahedra, and edges with six equivalent SbTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are three shorter (3.02 Å) and three longer (3.29 Å) Sb–Te bond lengths. There are three inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 3-coordinate geometry to three equivalent Sm3+ atoms. In the second Te2- site, Te2- is bonded in a 3-coordinate geometry to three equivalent Sb3+ atoms. In the third Te2- site, Te2- is bonded to three equivalent Sm3+ and three equivalent Sb3+ atoms to form distorted edge-sharing TeSm3Sb3 octahedra.