Materials Data on K3SbTe3 by Materials Project

Abstract

K3SbTe3 crystallizes in the cubic P2_13 space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to six equivalent Te2- atoms to form a mixture of corner, edge, and face-sharing KTe6 octahedra. The corner-sharing octahedra tilt angles range from 36–59°. There are three shorter (3.72 Å) and three longer (3.89 Å) K–Te bond lengths. In the second K1+ site, K1+ is bonded to six equivalent Te2- atoms to form a mixture of distorted corner, edge, and face-sharing KTe6 octahedra. The corner-sharing octahedra tilt angles range from 26–46°. There are three shorter (3.54 Å) and three longer (3.71 Å) K–Te bond lengths. In the third K1+ site, K1+ is bonded to six equivalent Te2- atoms to form a mixture of distorted corner, edge, and face-sharing KTe6 octahedra. The corner-sharing octahedra tilt angles range from 26–44°. There are three shorter (3.55 Å) and three longer (3.69 Å) K–Te bond lengths. Sb3+ is bonded in a trigonal non-coplanar geometry to three equivalent Te2- atoms. All Sb–Te bond lengths are 2.83 Å. Te2- is bonded to six K1+ and one Sb3+ atom to form a mixture of distorted corner, edge, and face-sharing TeK6Sb pentagonal bipyramids.