Materials Data on Pm3Zn by Materials Project
Pm3Zn is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Pm sites. In the first Pm site, Pm is bonded to eight Pm and four equivalent Zn atoms to form distorted PmPm8Zn4 cuboctahedra that share corners with twelve equivalent PmPm8Zn4 cuboctahedra, edges with eight equivalent PmPm8Zn4 cuboctahedra, edges with eight equivalent ZnPm12 cuboctahedra, faces with four equivalent ZnPm12 cuboctahedra, and faces with ten equivalent PmPm8Zn4 cuboctahedra. There are four shorter (3.38 Å) and four longer (3.46 Å) Pm–Pm bond lengths. All Pm–Zn bond lengths are 3.46 Å. In the second Pm site, Pm is bonded in a distorted square co-planar geometry to eight equivalent Pm and four equivalent Zn atoms. All Pm–Zn bond lengths are 3.38 Å. Zn is bonded to twelve Pm atoms to form ZnPm12 cuboctahedra that share corners with four equivalent ZnPm12 cuboctahedra, edges with eight equivalent ZnPm12 cuboctahedra, edges with sixteen equivalent PmPm8Zn4 cuboctahedra, faces with four equivalent ZnPm12 cuboctahedra, and faces with eight equivalent PmPm8Zn4 cuboctahedra.