MgTmSn crystallizes in the tetragonal I4/mmm space group. Mg(1) is bonded in a distorted square co-planar geometry to four equivalent Sn(1) atoms. Tm(1) is bonded to five equivalent Sn(1) atoms to form a mixture of distorted corner and edge-sharing TmSn5 square pyramids. Sn(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1) and five equivalent Tm(1) atoms.
MgTmSn crystallizes in the tetragonal I4/mmm space group. Mg(1) is bonded in a distorted square co-planar geometry to four equivalent Sn(1) atoms. All Mg(1)-Sn(1) bond lengths are 3.06 Å. Tm(1) is bonded to five equivalent Sn(1) atoms to form a mixture of distorted corner and edge-sharing TmSn5 square pyramids. There is one shorter (3.07 Å) and four longer (3.11 Å) Tm(1)-Sn(1) bond lengths. Sn(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1) and five equivalent Tm(1) atoms.