Materials Data on CePm3 by Materials Project

Abstract

Pm3Ce is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Pm is bonded to eight equivalent Pm and four equivalent Ce atoms to form PmCe4Pm8 cuboctahedra that share corners with four equivalent CePm12 cuboctahedra, corners with fourteen equivalent PmCe4Pm8 cuboctahedra, edges with six equivalent CePm12 cuboctahedra, edges with twelve equivalent PmCe4Pm8 cuboctahedra, faces with four equivalent CePm12 cuboctahedra, and faces with sixteen equivalent PmCe4Pm8 cuboctahedra. There are two shorter (3.66 Å) and six longer (3.67 Å) Pm–Pm bond lengths. There are two shorter (3.66 Å) and two longer (3.67 Å) Pm–Ce bond lengths. Ce is bonded to twelve equivalent Pm atoms to form CePm12 cuboctahedra that share corners with six equivalent CePm12 cuboctahedra, corners with twelve equivalent PmCe4Pm8 cuboctahedra, edges with eighteen equivalent PmCe4Pm8 cuboctahedra, faces with eight equivalent CePm12 cuboctahedra, and faces with twelve equivalent PmCe4Pm8 cuboctahedra.