Preparation and crystal structure characterization of CuNiGaSe3 and CuNiInSe3 quaternary compounds

Abstract

Samples of the quaternary chalcogenide compounds, CuNiGaSe3 and CuNiInSe3, prepared by direct fusion and annealing method, were characterized by X-ray powder diffraction. In each case, the crystal structure was refined using the Rietveld method. Both compounds were found to crystallize in the tetragonal system, space group P4̄2c (N°112), with unit cell parameter values a = 5.6213(1) Å, c = 11.0282(3) Å, V = 348.48(1) Å3 and a = 5.7857(2) Å, c = 11.6287(5) Å, V = 389.26(3) Å3 for CuNiGaSe3 and CuNiInSe3, respectively. These compounds have a normal adamantane structures and are isostructural with CuFeInSe3. © Indian Academy of Sciences.