Phase equilibria in the NiX–La₂X₃–Ga(In)₂X₃ (X = S, Se) systems and crystal structure of the La₃NiGaS₇ compound

Chem. Met. Alloys 9 (2016) 113-118

https://doi.org/10.30970/cma9.0339

Nazar BLASHKO, Ivan OLEKSEYUK, Anatoliy FEDORCHUK, Oleg MARCHUK

The isothermal sections of the quasi-ternary NiX–La₂X₃–Ga(In)₂X₃ (X = S, Se) systems at 770 K were constructed using X-ray diffraction. The crystal structure of the quaternary compound La₃NiGaS₇ (structure type La₃MnGaS₇, Pearson symbol hP24, space group P6₃, a = 1.01605(4), c = 0.60397(3) nm, R_I = 0.0856, R_p = 0.1897) was determined by X-ray powder diffraction.

Unit cell and coordination polyhedra of the atoms in the La₃NiGaS₇ structure.

Keywords

Rare-earth elements / X-ray powder diffraction / Crystal structure