Materials Data on ThMg3 by Materials Project
Mg3Th crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Mg is bonded to eight equivalent Mg and four equivalent Th atoms to form distorted MgTh4Mg8 cuboctahedra that share corners with four equivalent ThMg12 cuboctahedra, corners with fourteen equivalent MgTh4Mg8 cuboctahedra, edges with six equivalent ThMg12 cuboctahedra, edges with twelve equivalent MgTh4Mg8 cuboctahedra, faces with four equivalent ThMg12 cuboctahedra, and faces with sixteen equivalent MgTh4Mg8 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.22–3.51 Å. There are two shorter (3.31 Å) and two longer (3.39 Å) Mg–Th bond lengths. Th is bonded to twelve equivalent Mg atoms to form ThMg12 cuboctahedra that share corners with six equivalent ThMg12 cuboctahedra, corners with twelve equivalent MgTh4Mg8 cuboctahedra, edges with eighteen equivalent MgTh4Mg8 cuboctahedra, faces with eight equivalent ThMg12 cuboctahedra, and faces with twelve equivalent MgTh4Mg8 cuboctahedra.