MgNp3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Mg(1) is bonded to twelve equivalent Np(1) atoms to form MgNp12 cuboctahedra that share corners with twelve equivalent Mg(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Mg4Np8 cuboctahedra, faces with six equivalent Mg(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Mg4Np8 cuboctahedra. Np(1) is bonded to four equivalent Mg(1) and eight equivalent Np(1) atoms to form NpMg4Np8 cuboctahedra that share corners with twelve equivalent Np(1)Mg4Np8 cuboctahedra, edges with eight equivalent Mg(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Mg4Np8 cuboctahedra, faces with four equivalent Mg(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Mg4Np8 cuboctahedra.
MgNp3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Mg(1) is bonded to twelve equivalent Np(1) atoms to form MgNp12 cuboctahedra that share corners with twelve equivalent Mg(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Mg4Np8 cuboctahedra, faces with six equivalent Mg(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Mg4Np8 cuboctahedra. All Mg(1)-Np(1) bond lengths are 3.24 Å. Np(1) is bonded to four equivalent Mg(1) and eight equivalent Np(1) atoms to form NpMg4Np8 cuboctahedra that share corners with twelve equivalent Np(1)Mg4Np8 cuboctahedra, edges with eight equivalent Mg(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Mg4Np8 cuboctahedra, faces with four equivalent Mg(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Mg4Np8 cuboctahedra. All Np(1)-Np(1) bond lengths are 3.24 Å.