Doping of CuSc3–xLnxS5 (Ln = Y, Lu) Compounds with the Spinel Structure

The method of solid-phase synthesis was used to obtain the compound CuSc3S5, which crystallizes to form a spinel structure (Fd $$\overline 3 $$ m). The regions of the compound doping with yttrium and lutetium ions were calculated. It was found by X-ray phase and microstructural analyses that the spinel structure is preserved for CuSc3–xYxS5 (x = 0‒0.4) and CuSc3–xLuxS5 (x = 0‒0.7) compounds. The unit cell parameter of the compound increases in direct proportion to the dopant ion amount.