Materials Data on K3In by Materials Project

Abstract

K3In is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded to eight K and four equivalent In atoms to form distorted KK8In4 cuboctahedra that share corners with twelve equivalent KK8In4 cuboctahedra, edges with eight equivalent InK12 cuboctahedra, edges with sixteen KK8In4 cuboctahedra, faces with four equivalent InK12 cuboctahedra, and faces with fourteen KK8In4 cuboctahedra. There are four shorter (4.09 Å) and four longer (4.13 Å) K–K bond lengths. All K–In bond lengths are 4.13 Å. In the second K site, K is bonded to eight equivalent K and four equivalent In atoms to form distorted KK8In4 cuboctahedra that share corners with four equivalent KK8In4 cuboctahedra, corners with eight equivalent InK12 cuboctahedra, edges with twenty-four KK8In4 cuboctahedra, faces with six equivalent InK12 cuboctahedra, and faces with twelve KK8In4 cuboctahedra. All K–In bond lengths are 4.09 Å. In is bonded to twelve K atoms to form InK12 cuboctahedra that share corners with four equivalent InK12 cuboctahedra, corners with eight equivalent KK8In4 cuboctahedra, edges with eight equivalent InK12 cuboctahedra, edges with sixteen equivalent KK8In4 cuboctahedra, faces with four equivalent InK12 cuboctahedra, and faces with fourteen KK8In4 cuboctahedra.