期刊
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
卷 59, 期 11, 页码 1219-1227出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0036023614110084
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资金
- Russian Scientific Foundation [14-19-00752]
- Russian Science Foundation [14-19-00752] Funding Source: Russian Science Foundation
Phase equilibria in the quasi-binary sections Ca-3(PO4)(2)-CaMPO4 (M = Na, K) are distinguished by high-temperature isomorphism of glaserite-like phases alpha'-Ca-3(PO4)(2) and alpha-CaMPO4. The main differences of the Ca-3(PO4)(2)-CaKPO4 system from the Ca-3(PO4)(2)-CaNaPO4 system are a shift of invariant equilibria toward higher temperatures, deceleration of phase transformations, and the emergence of polymorphism of an intermediate phase of an ordered solid solution based on alpha-CaKPO4. The low-temperature modification of this phase of a composition near Ca8K2(PO4)(6) has the apatite structure with unoccupied hexagonal channels.
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