Np3P is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded to four equivalent Np(2) and four equivalent P(1) atoms to form distorted NpNp4P4 cuboctahedra that share corners with eight equivalent Np(1)Np4P4 cuboctahedra, corners with eight equivalent Np(2)Np8P4 cuboctahedra, corners with eight equivalent P(1)Np12 cuboctahedra, edges with four equivalent Np(2)Np8P4 cuboctahedra, edges with four equivalent P(1)Np12 cuboctahedra, edges with twelve equivalent Np(1)Np4P4 cuboctahedra, and faces with six equivalent Np(1)Np4P4 cuboctahedra. In the second Np site, Np(2) is bonded to eight equivalent Np(1) and four equivalent P(1) atoms to form distorted NpNp8P4 cuboctahedra that share corners with four equivalent Np(2)Np8P4 cuboctahedra, corners with eight equivalent P(1)Np12 cuboctahedra, corners with sixteen equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent Np(2)Np8P4 cuboctahedra, faces with four equivalent Np(2)Np8P4 cuboctahedra, and faces with six equivalent P(1)Np12 cuboctahedra. P(1) is bonded to four equivalent Np(2) and eight equivalent Np(1) atoms to form PNp12 cuboctahedra that share corners with four equivalent P(1)Np12 cuboctahedra, corners with eight equivalent Np(2)Np8P4 cuboctahedra, corners with sixteen equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent P(1)Np12 cuboctahedra, faces with four equivalent P(1)Np12 cuboctahedra, and faces with six equivalent Np(2)Np8P4 cuboctahedra.
Np3P is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded to four equivalent Np(2) and four equivalent P(1) atoms to form distorted NpNp4P4 cuboctahedra that share corners with eight equivalent Np(1)Np4P4 cuboctahedra, corners with eight equivalent Np(2)Np8P4 cuboctahedra, corners with eight equivalent P(1)Np12 cuboctahedra, edges with four equivalent Np(2)Np8P4 cuboctahedra, edges with four equivalent P(1)Np12 cuboctahedra, edges with twelve equivalent Np(1)Np4P4 cuboctahedra, and faces with six equivalent Np(1)Np4P4 cuboctahedra. All Np(1)-Np(2) bond lengths are 2.92 Å. All Np(1)-P(1) bond lengths are 2.92 Å. In the second Np site, Np(2) is bonded to eight equivalent Np(1) and four equivalent P(1) atoms to form distorted NpNp8P4 cuboctahedra that share corners with four equivalent Np(2)Np8P4 cuboctahedra, corners with eight equivalent P(1)Np12 cuboctahedra, corners with sixteen equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent Np(2)Np8P4 cuboctahedra, faces with four equivalent Np(2)Np8P4 cuboctahedra, and faces with six equivalent P(1)Np12 cuboctahedra. All Np(2)-P(1) bond lengths are 2.97 Å. P(1) is bonded to four equivalent Np(2) and eight equivalent Np(1) atoms to form PNp12 cuboctahedra that share corners with four equivalent P(1)Np12 cuboctahedra, corners with eight equivalent Np(2)Np8P4 cuboctahedra, corners with sixteen equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent Np(1)Np4P4 cuboctahedra, edges with eight equivalent P(1)Np12 cuboctahedra, faces with four equivalent P(1)Np12 cuboctahedra, and faces with six equivalent Np(2)Np8P4 cuboctahedra.