Materials Data on Sr3Pm by Materials Project

Abstract

Sr3Pm is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Sr is bonded to eight equivalent Sr and four equivalent Pm atoms to form distorted SrSr8Pm4 cuboctahedra that share corners with four equivalent PmSr12 cuboctahedra, corners with fourteen equivalent SrSr8Pm4 cuboctahedra, edges with six equivalent PmSr12 cuboctahedra, edges with twelve equivalent SrSr8Pm4 cuboctahedra, faces with four equivalent PmSr12 cuboctahedra, and faces with sixteen equivalent SrSr8Pm4 cuboctahedra. There are a spread of Sr–Sr bond distances ranging from 3.97–4.21 Å. There are two shorter (4.00 Å) and two longer (4.09 Å) Sr–Pm bond lengths. Pm is bonded to twelve equivalent Sr atoms to form PmSr12 cuboctahedra that share corners with six equivalent PmSr12 cuboctahedra, corners with twelve equivalent SrSr8Pm4 cuboctahedra, edges with eighteen equivalent SrSr8Pm4 cuboctahedra, faces with eight equivalent PmSr12 cuboctahedra, and faces with twelve equivalent SrSr8Pm4 cuboctahedra.