Funct. Mater. 2023; 30 (4): 519-525.
The behavior of Co3-xMІІx(PO4)2·8H2O (MІІ = Mg, Mn, Zn) solid solutions at elevated temperatures
National University of Life and Environmental Sciences of Ukraine,Heroiv Oborony Str., 17, 03041, Kyiv, Ukraine
It has been determined that heating of solid solutions of hydrated medium phosphates of the composition Со3-xМxII(PO4)2·8Н2O (МII = Mg, Mn, Zn) is accompanied by dehydration processes with the formation of lower hydration phosphates with the composition Со3-xМxII(PO4)2·nН2O, where 1.0≤n≤7.0. Further dehydration leads to the realization of the processes of amorphization and condensation of the phosphate anion. It has been shown that the content of condensed phosphates, depending on the cationic composition of the solid solution, is 7.2–9.6 rel. % P2O5
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