Tm2Au is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to four equivalent Au(1) atoms to form a mixture of edge and corner-sharing TmAu4 tetrahedra. In the second Tm site, Tm(2) is bonded in a 3-coordinate geometry to five equivalent Au(1) atoms. Au(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1) and five equivalent Tm(2) atoms.
Tm2Au is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to four equivalent Au(1) atoms to form a mixture of edge and corner-sharing TmAu4 tetrahedra. There are a spread of Tm(1)-Au(1) bond distances ranging from 2.83-2.99 Å. In the second Tm site, Tm(2) is bonded in a 3-coordinate geometry to five equivalent Au(1) atoms. There are a spread of Tm(2)-Au(1) bond distances ranging from 2.88-3.57 Å. Au(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1) and five equivalent Tm(2) atoms.