A new method of growing K2CoxNi1−x(SO4)2*6H2O (x=0; 0.4; 0.8; 1) mixed crystals and their spectral investigation

A new method of K2CoxNi1−x(SO4)2·6H2O mixed crystals growing was proposed. High-quality samples were synthesized from the water solution of K2SO4, NiCl2, and CoCl2. Transmission spectra of these crystals were investigated in the wavelength range of 200–900 nm. The bands that are responsible for the electronic transitions in octahedral complexes CoO6 and NiO6 are independently presented in these spectra. Infrared reflection was measured for these crystals in the range of 2.5–20 μm. The identification of IR active mode frequencies was performed on the base of measured data.