Tm5Pd2Sb crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to four equivalent Pd(1) and two equivalent Sb(1) atoms to form distorted TmSb2Pd4 octahedra that share corners with six equivalent Tm(1)Sb2Pd4 octahedra, corners with sixteen equivalent Tm(2)Sb2Pd3 trigonal bipyramids, and faces with eight equivalent Tm(2)Sb2Pd3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-48°. In the second Tm site, Tm(2) is bonded to three equivalent Pd(1) and two equivalent Sb(1) atoms to form distorted TmSb2Pd3 trigonal bipyramids that share corners with four equivalent Tm(1)Sb2Pd4 octahedra, corners with twelve equivalent Tm(2)Sb2Pd3 trigonal bipyramids, edges with seven equivalent Tm(2)Sb2Pd3 trigonal bipyramids, faces with two equivalent Tm(1)Sb2Pd4 octahedra, and  a faceface with one Tm(2)Sb2Pd3 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 44-63°. Pd(1) is bonded in a 8-coordinate geometry to two equivalent Tm(1) and six equivalent Tm(2) atoms. Sb(1) is bonded in a 10-coordinate geometry to two equivalent Tm(1) and eight equivalent Tm(2) atoms.
Tm5Pd2Sb crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to four equivalent Pd(1) and two equivalent Sb(1) atoms to form distorted TmSb2Pd4 octahedra that share corners with six equivalent Tm(1)Sb2Pd4 octahedra, corners with sixteen equivalent Tm(2)Sb2Pd3 trigonal bipyramids, and faces with eight equivalent Tm(2)Sb2Pd3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-48°. All Tm(1)-Pd(1) bond lengths are 2.94 Å. Both Tm(1)-Sb(1) bond lengths are 3.37 Å. In the second Tm site, Tm(2) is bonded to three equivalent Pd(1) and two equivalent Sb(1) atoms to form distorted TmSb2Pd3 trigonal bipyramids that share corners with four equivalent Tm(1)Sb2Pd4 octahedra, corners with twelve equivalent Tm(2)Sb2Pd3 trigonal bipyramids, edges with seven equivalent Tm(2)Sb2Pd3 trigonal bipyramids, faces with two equivalent Tm(1)Sb2Pd4 octahedra, and  a faceface with one Tm(2)Sb2Pd3 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 44-63°. All Tm(2)-Pd(1) bond lengths are 2.94 Å. Both Tm(2)-Sb(1) bond lengths are 3.22 Å. Pd(1) is bonded in a 8-coordinate geometry to two equivalent Tm(1) and six equivalent Tm(2) atoms. Sb(1) is bonded in a 10-coordinate geometry to two equivalent Tm(1) and eight equivalent Tm(2) atoms.