The RECu_1-xGa_xIn (RE = La, Ce) systems at 870 K

Chem. Met. Alloys 13 (2020) 1-7

https://doi.org/10.30970/cma13.0395

Nataliya Dominyuk, Galyna Nychyporuk, Ihor Muts, Vasyl Zaremba

The interaction between the components in the RECu_1-хGa_xIn (RE = La, Ce) systems at 870 K was investigated by X-ray diffraction and local EDX-analysis in the full concentration range. The solubility ranges of the solid solutions, the crystal structures of the phases and the changes of the unit-cell parameters were determined: LaCu_1.00-0.80Ga_0-0.20In (ZrNiAl-type structure): a = 755.0–752.0(1), c = 428.0–430.4(1) pm; СеCu_1.00-0.80Ga_0-0.20In (ZrNiAl-type structure): а = 749.2–744.4(1), с = 424.5–431.1(1) pm; LaCu_0.50-0.25Ga_0.50-0.75In (CaIn₂-type structure): а = 473.2(1)–479.5(1), с = 783.2(2)–792.7(2) pm; СеCu_0.70-0.25Ga_0.30-0.75In (CaIn₂-type structure): а = 472.0(1)–478.1(1), с = 766.5(2)–784.7(2) pm. The crystal structure of the LaCu_0.40Ga_0.60In compound was investigated by single-crystal X-ray diffraction (Mo Kα-radiation): CaIn₂-type structure, P6₃/mmc, hP6, a = 473.6(1), c = 786.6(2) pm, R₁ = 0.0390 for 107 F² values and 7 variables.

Observed, calculated, and difference X-ray patterns of the CeCu_0.5Ga_0.5In alloy (Cu Kα₁ radiation).

Keywords

Indide / Solid solution / Powder diffraction / Single crystal / Crystal structure