Tm is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to six equivalent Tm(1) and six equivalent Tm(2) atoms to form a mixture of edge, face, and corner-sharing TmTm12 cuboctahedra. In the second Tm site, Tm(2) is bonded to six equivalent Tm(1) and six equivalent Tm(2) atoms to form a mixture of edge, face, and corner-sharing TmTm12 cuboctahedra.
Tm is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to six equivalent Tm(1) and six equivalent Tm(2) atoms to form a mixture of edge, face, and corner-sharing TmTm12 cuboctahedra. All Tm(1)-Tm(1) bond lengths are 3.51 Å. All Tm(1)-Tm(2) bond lengths are 3.47 Å. In the second Tm site, Tm(2) is bonded to six equivalent Tm(1) and six equivalent Tm(2) atoms to form a mixture of edge, face, and corner-sharing TmTm12 cuboctahedra. All Tm(2)-Tm(2) bond lengths are 3.51 Å.