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TmIn is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tm is bonded in a body-centered cubic geometry to eight equivalent In atoms. All Tm–In bond lengths are 3.22 Å. In is bonded in a body-centered cubic geometry to eight equivalent Tm atoms.
TmIn3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tm is bonded to twelve equivalent In atoms to form TmIn12 cuboctahedra that share corners with twelve equivalent TmIn12 cuboctahedra, edges with twenty-four equivalent InTm4In8 cuboctahedra, faces with six equivalent TmIn12 cuboctahedra, and faces with twelve equivalent InTm4In8 cuboctahedra. All Tm–In bond lengths are 3.26 Å. In is bonded to four equivalent Tm and eight equivalent In atoms to form distorted InTm4In8 cuboctahedra that share corners with twelve equivalent InTm4In8 cuboctahedra, edges with eight equivalent TmIn12 cuboctahedra, edges with sixteen equivalent InTm4In8 cuboctahedra, faces with four equivalent TmIn12 cuboctahedra, and faces with fourteen equivalent InTm4In8 cuboctahedra. All In–In bond lengths are 3.26 Å.
Tm2In crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Tm sites. In the first Tm site, Tm is bonded in a 6-coordinate geometry to eight Tm and six equivalent In atoms. There are two shorter (3.35 Å) and six longer (3.49 Å) Tm–Tm bond lengths. All Tm–In bond lengths are 3.49 Å. In the second Tm site, Tm is bonded to six equivalent Tm and five equivalent In atoms to form a mixture of distorted corner and face-sharing TmTm6In5 trigonal bipyramids. There are three shorter (3.06 Å) and two longer (3.35 Å) Tm–In bond lengths. In is bonded in a 11-coordinate geometry to eleven Tm atoms.
Tm3In is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tm is bonded to eight equivalent Tm and four equivalent In atoms to form distorted TmTm8In4 cuboctahedra that share corners with twelve equivalent TmTm8In4 cuboctahedra, edges with eight equivalent InTm12 cuboctahedra, edges with sixteen equivalent TmTm8In4 cuboctahedra, faces with four equivalent InTm12 cuboctahedra, and faces with fourteen equivalent TmTm8In4 cuboctahedra. All Tm–Tm bond lengths are 3.39 Å. All Tm–In bond lengths are 3.39 Å. In is bonded to twelve equivalent Tm atoms to form InTm12 cuboctahedra that share corners with twelve equivalent InTm12 cuboctahedra, edges with twenty-four equivalent TmTm8In4 cuboctahedra, faces with six equivalent InTm12 cuboctahedra, and faces with twelve equivalent TmTm8In4 cuboctahedra.