NpAl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to twelve equivalent Al(1) atoms to form NpAl12 cuboctahedra that share corners with twelve equivalent Np(1)Al12 cuboctahedra, edges with twenty-four equivalent Al(1)Np4Al8 cuboctahedra, faces with six equivalent Np(1)Al12 cuboctahedra, and faces with twelve equivalent Al(1)Np4Al8 cuboctahedra. Al(1) is bonded to four equivalent Np(1) and eight equivalent Al(1) atoms to form AlNp4Al8 cuboctahedra that share corners with twelve equivalent Al(1)Np4Al8 cuboctahedra, edges with eight equivalent Np(1)Al12 cuboctahedra, edges with sixteen equivalent Al(1)Np4Al8 cuboctahedra, faces with four equivalent Np(1)Al12 cuboctahedra, and faces with fourteen equivalent Al(1)Np4Al8 cuboctahedra.
NpAl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to twelve equivalent Al(1) atoms to form NpAl12 cuboctahedra that share corners with twelve equivalent Np(1)Al12 cuboctahedra, edges with twenty-four equivalent Al(1)Np4Al8 cuboctahedra, faces with six equivalent Np(1)Al12 cuboctahedra, and faces with twelve equivalent Al(1)Np4Al8 cuboctahedra. All Np(1)-Al(1) bond lengths are 3.00 Å. Al(1) is bonded to four equivalent Np(1) and eight equivalent Al(1) atoms to form AlNp4Al8 cuboctahedra that share corners with twelve equivalent Al(1)Np4Al8 cuboctahedra, edges with eight equivalent Np(1)Al12 cuboctahedra, edges with sixteen equivalent Al(1)Np4Al8 cuboctahedra, faces with four equivalent Np(1)Al12 cuboctahedra, and faces with fourteen equivalent Al(1)Np4Al8 cuboctahedra. All Al(1)-Al(1) bond lengths are 3.00 Å.