Materials Data on Pm3Er by Materials Project

Abstract

ErPm3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Er is bonded to twelve Pm atoms to form ErPm12 cuboctahedra that share corners with four equivalent ErPm12 cuboctahedra, corners with eight equivalent PmPm8Er4 cuboctahedra, edges with eight equivalent ErPm12 cuboctahedra, edges with sixteen equivalent PmPm8Er4 cuboctahedra, faces with four equivalent ErPm12 cuboctahedra, and faces with fourteen PmPm8Er4 cuboctahedra. There are four shorter (3.61 Å) and eight longer (3.63 Å) Er–Pm bond lengths. There are two inequivalent Pm sites. In the first Pm site, Pm is bonded to four equivalent Er and eight Pm atoms to form PmPm8Er4 cuboctahedra that share corners with twelve equivalent PmPm8Er4 cuboctahedra, edges with eight equivalent ErPm12 cuboctahedra, edges with sixteen PmPm8Er4 cuboctahedra, faces with four equivalent ErPm12 cuboctahedra, and faces with fourteen PmPm8Er4 cuboctahedra. There are four shorter (3.61 Å) and four longer (3.63 Å) Pm–Pm bond lengths. In the second Pm site, Pm is bonded to four equivalent Er and eight equivalent Pm atoms to form PmPm8Er4 cuboctahedra that share corners with four equivalent PmPm8Er4 cuboctahedra, corners with eight equivalent ErPm12 cuboctahedra, edges with twenty-four PmPm8Er4 cuboctahedra, faces with six equivalent ErPm12 cuboctahedra, and faces with twelve PmPm8Er4 cuboctahedra.