Materials Data on Ho3Np by Materials Project
NpHo3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Np is bonded to twelve equivalent Ho atoms to form NpHo12 cuboctahedra that share corners with six equivalent NpHo12 cuboctahedra, corners with twelve equivalent HoHo8Np4 cuboctahedra, edges with eighteen equivalent HoHo8Np4 cuboctahedra, faces with eight equivalent NpHo12 cuboctahedra, and faces with twelve equivalent HoHo8Np4 cuboctahedra. There are six shorter (3.45 Å) and six longer (3.51 Å) Np–Ho bond lengths. Ho is bonded to four equivalent Np and eight equivalent Ho atoms to form HoHo8Np4 cuboctahedra that share corners with four equivalent NpHo12 cuboctahedra, corners with fourteen equivalent HoHo8Np4 cuboctahedra, edges with six equivalent NpHo12 cuboctahedra, edges with twelve equivalent HoHo8Np4 cuboctahedra, faces with four equivalent NpHo12 cuboctahedra, and faces with sixteen equivalent HoHo8Np4 cuboctahedra. There are a spread of Ho–Ho bond distances ranging from 3.46–3.55 Å.