Hf₃Ga_1.97(2)Sn_1.03(2), a ternary derivative of the ThIn type

Chem. Met. Alloys 4 (2011) 166-174

https://doi.org/10.30970/cma4.0191

Iryna VOZNYAK, Yaroslav TOKAYCHUK, Viktor HLUKHYY, Thomas F. FÄSSLER, Roman GLADYSHEVSKII

The crystal structure of the substitutional solid solution HfGa_1-xSn_x (x = 0-0.34(1)) was refined from X-ray single-crystal and powder diffraction data (space group Pbcm, Pearson symbol oP24, a = 9.3370(19), b = 8.6920(17), c = 5.6650(11) Å for Hf₃Ga_1.97(2)Sn_1.03(2)). The structure of the ideal limiting formula Hf₃Ga₂Sn, ignoring partial Ga/Sn disorder, represents the first ternary ordering derivative of the structure type ThIn. The structure of Hf₃Ga₂Sn is closely related to that of Hf₅GaSn₃ (limiting composition of the interstitial solid solution Hf₅Ga_xSn₃ (x = 0-1), structure type Hf₅CuSn₃, space group P6₃/mcm) and can be derived from it applying group-subgroup relations between the space groups.

Monoatomic layers in the structure of Hf₅CuSn₃.

Keywords

Hafnium / Gallium / Tin / Single-crystal X-ray diffraction / Crystal structure / Substitutional solid solution