Tm2Ni2Sn crystallizes in the tetragonal P4/mbm space group. Tm(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Sn(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to six equivalent Tm(1), one Ni(1), and two equivalent Sn(1) atoms. Sn(1) is bonded to eight equivalent Tm(1) and four equivalent Ni(1) atoms to form a mixture of face and corner-sharing SnTm8Ni4 cuboctahedra.
Tm2Ni2Sn crystallizes in the tetragonal P4/mbm space group. Tm(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Sn(1) atoms. There are two shorter (2.77 Å) and four longer (2.81 Å) Tm(1)-Ni(1) bond lengths. All Tm(1)-Sn(1) bond lengths are 3.22 Å. Ni(1) is bonded in a 9-coordinate geometry to six equivalent Tm(1), one Ni(1), and two equivalent Sn(1) atoms. The Ni(1)-Ni(1) bond length is 2.47 Å. Both Ni(1)-Sn(1) bond lengths are 2.88 Å. Sn(1) is bonded to eight equivalent Tm(1) and four equivalent Ni(1) atoms to form a mixture of face and corner-sharing SnTm8Ni4 cuboctahedra.