Features of Phase Formation in the CsOH–H<sub>2</sub>SO<sub>4</sub>–H<sub>3</sub>PO<sub>4</sub>–H<sub>2</sub>O System and the Growth of the Cs<sub>6</sub>(SO<sub>4</sub>)<sub>3</sub>(H<sub>3</sub>PO<sub>4</sub>)<sub>4</sub> Crystals
V. A. Komornikov,
I. P. Makarova,
I. S. Timakov,
V. V. Grebenev
Affiliations
V. A. Komornikov
Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Moscow 119333, Russia
I. P. Makarova
Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Moscow 119333, Russia
I. S. Timakov
Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Moscow 119333, Russia
V. V. Grebenev
Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Moscow 119333, Russia
In this paper, the conditions of phase formation in the system CsOH–H2SO4–H3PO4–H2O are considered for the first time. The phase formation of Cs6(SO4)3(H3PO4)4 at t = 50 °C has been studied extensively. The main concentration boundary conditions for this compound are considered for the first time. The solubility congruence of Cs6(SO4)3(H3PO4)4 is shown. Conditions and approaches for obtaining crystals by isothermal evaporation and saturated solution temperature reduction methods are considered. The results of obtaining Cs6(SO4)3(H3PO4)4 crystals with maximum dimensions of ~20 mm are presented.
