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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on HoNp3 by Materials Project

Np3Ho is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to eight equivalent Np and four equivalent Ho atoms to form NpHo4Np8 cuboctahedra that share corners with twelve equivalent NpHo4Np8 cuboctahedra, edges with eight equivalent HoNp12 cuboctahedra, edges with sixteen equivalent NpHo4Np8 cuboctahedra, faces with four equivalent HoNp12 cuboctahedra, and faces with fourteen equivalent NpHo4Np8 cuboctahedra. All Np–Np bond lengths are 3.28 Å. All Np–Ho bond lengths are 3.28 Å. Ho is bonded to twelve equivalent Np atoms to form HoNp12 cuboctahedra that share corners with twelve equivalent HoNp12 cuboctahedra, edges with twenty-four equivalent NpHo4Np8 cuboctahedra, faces with six equivalent HoNp12 cuboctahedra, and faces with twelve equivalent NpHo4Np8 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HoNp3 by Materials Project

Np3Ho is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Np sites. In the first Np site, Np is bonded to eight Np and four equivalent Ho atoms to form NpHo4Np8 cuboctahedra that share corners with twelve equivalent NpHo4Np8 cuboctahedra, edges with eight equivalent HoNp12 cuboctahedra, edges with sixteen NpHo4Np8 cuboctahedra, faces with four equivalent HoNp12 cuboctahedra, and faces with fourteen NpHo4Np8 cuboctahedra. All Np–Np bond lengths are 3.23 Å. All Np–Ho bond lengths are 3.23 Å. In the second Np site, Np is bonded to eight equivalent Np and four equivalent Ho atoms to form NpHo4Np8 cuboctahedra that share corners with four equivalent NpHo4Np8 cuboctahedra, corners with eight equivalent HoNp12 cuboctahedra, edges with twenty-four NpHo4Np8 cuboctahedra, faces with six equivalent HoNp12 cuboctahedra, and faces with twelve NpHo4Np8 cuboctahedra. All Np–Ho bond lengths are 3.23 Å. Ho is bonded to twelve Np atoms to form HoNp12 cuboctahedra that share corners with four equivalent HoNp12 cuboctahedra, corners with eight equivalent NpHo4Np8 cuboctahedra, edges with eight equivalent HoNp12 cuboctahedra, edges with sixteen equivalent NpHo4Np8 cuboctahedra, faces with four equivalent HoNp12 cuboctahedra, and faces with fourteen NpHo4Np8 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

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.

36 MATERIALS SCIENCE↗