MgSnNd crystallizes in the tetragonal I4/mmm space group. Mg(1) is bonded to four equivalent Mg(1), four equivalent Nd(1), and four equivalent Sn(1) atoms to form distorted MgNd4Mg4Sn4 cuboctahedra that share corners with four equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, corners with four equivalent Nd(1)Mg4Sn5 square pyramids, edges with eight equivalent Nd(1)Mg4Sn5 square pyramids, faces with eight equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, and faces with four equivalent Nd(1)Mg4Sn5 square pyramids. Nd(1) is bonded to four equivalent Mg(1) and five equivalent Sn(1) atoms to form distorted NdMg4Sn5 square pyramids that share corners with four equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, corners with eight equivalent Nd(1)Mg4Sn5 square pyramids, edges with eight equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, edges with four equivalent Nd(1)Mg4Sn5 square pyramids, faces with four equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, and faces with five equivalent Nd(1)Mg4Sn5 square pyramids. Sn(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1) and five equivalent Nd(1) atoms.
MgSnNd crystallizes in the tetragonal I4/mmm space group. Mg(1) is bonded to four equivalent Mg(1), four equivalent Nd(1), and four equivalent Sn(1) atoms to form distorted MgNd4Mg4Sn4 cuboctahedra that share corners with four equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, corners with four equivalent Nd(1)Mg4Sn5 square pyramids, edges with eight equivalent Nd(1)Mg4Sn5 square pyramids, faces with eight equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, and faces with four equivalent Nd(1)Mg4Sn5 square pyramids. All Mg(1)-Mg(1) bond lengths are 3.18 Å. All Mg(1)-Nd(1) bond lengths are 3.50 Å. All Mg(1)-Sn(1) bond lengths are 3.12 Å. Nd(1) is bonded to four equivalent Mg(1) and five equivalent Sn(1) atoms to form distorted NdMg4Sn5 square pyramids that share corners with four equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, corners with eight equivalent Nd(1)Mg4Sn5 square pyramids, edges with eight equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, edges with four equivalent Nd(1)Mg4Sn5 square pyramids, faces with four equivalent Mg(1)Nd4Mg4Sn4 cuboctahedra, and faces with five equivalent Nd(1)Mg4Sn5 square pyramids. There are four shorter (3.22 Å) and one longer (3.27 Å) Nd(1)-Sn(1) bond length. Sn(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1) and five equivalent Nd(1) atoms.