A new method for obtaining KCe(PO) ∙ xHO (s. g. I4/amd, a= b= 6.8300(2), c= 17.8488(4) Å, V= 832.63(4) Å, Z= 4) under hydrothermal conditions has been developed. It has been established that the thermolysis of this compound proceeds through three stages of mass loss with the formation of CePO и KPO as intermediate products, which upon further heating form a mixture of CePO and KCe(PO). The calculated values of the sun protection factor and UVA protection factor for KCe(PO) ∙ xHO were 2.1 and 2.0, respectively. In relation to the human keratinocyte cell line (HaCaT), a photoprotective effect of KCe(PO) ∙ xHO was recorded. For the first time, the photoactive properties of KCe(PO) and KCe(PO) ∙ хHO in the decomposition reaction of methylene blue were evaluated. A significant slowdown in the decomposition reaction of an organic dye was demonstrated when using KCe(PO) ∙ хHO.
T.O. Kozlova (Wed,) studied this question.