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 P \( \bar 4 \)2c (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.
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