Materials Data on MgNp3 by Materials Project

Abstract

MgNp3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Mg is bonded to twelve Np atoms to form MgNp12 cuboctahedra that share corners with four equivalent MgNp12 cuboctahedra, corners with eight equivalent NpMg4Np8 cuboctahedra, edges with eight equivalent MgNp12 cuboctahedra, edges with sixteen equivalent NpMg4Np8 cuboctahedra, faces with four equivalent MgNp12 cuboctahedra, and faces with fourteen NpMg4Np8 cuboctahedra. There are eight shorter (3.06 Å) and four longer (3.10 Å) Mg–Np bond lengths. There are two inequivalent Np sites. In the first Np site, Np is bonded to four equivalent Mg and eight equivalent Np atoms to form NpMg4Np8 cuboctahedra that share corners with four equivalent NpMg4Np8 cuboctahedra, corners with eight equivalent MgNp12 cuboctahedra, edges with twenty-four NpMg4Np8 cuboctahedra, faces with six equivalent MgNp12 cuboctahedra, and faces with twelve NpMg4Np8 cuboctahedra. All Np–Np bond lengths are 3.06 Å. In the second Np site, Np is bonded to four equivalent Mg and eight Np atoms to form NpMg4Np8 cuboctahedra that share corners with twelve equivalent NpMg4Np8 cuboctahedra, edges with eight equivalent MgNp12 cuboctahedra, edges with sixteen NpMg4Np8 cuboctahedra, faces with four equivalent MgNp12 cuboctahedra, and faces with fourteen NpMg4Np8 cuboctahedra. All Np–Np bond lengths are 3.10 Å.