COMPOSITION AND PROPERTIES OF THERMOPHOSPHATES FROM APATITE AND ALUMINOSILICATES

Authors
TONSUAADU K RIMM K VEIDERMA M
Citation
K. Tonsuaadu et al., COMPOSITION AND PROPERTIES OF THERMOPHOSPHATES FROM APATITE AND ALUMINOSILICATES, Phosphorus, sulfur and silicon and the related elements, 84(1-4), 1993, pp. 73-81
Citations number
11
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Phosphorus, sulfur and silicon and the related elements → ACNP
ISSN journal
10426507
Volume
84
Issue
1-4
Year of publication
1993
Pages
73 - 81
Database
ISI
SICI code
1042-6507(1993)84:1-4<73:CAPOTF>2.0.ZU;2-J
Abstract
Decomposition of Kovdor apatite at 1350-degrees-C in the mixture with or without H3PO4 and with aluminosilicates (glauconite, nepheline, pse udoleicite) and the solubility in 2% citric acid solution of the calci ned phosphate components (P, Ca, Mg, Fe, K, Na, Si) have been studied by chemical and X-ray powder diffraction analysis. The solubility of P 2O5 is 56-73% of its total content in the mixture with G, 42-78% with N and 53-82% with P, as the result of formation of solid solution alph a-Ca3(PO4)2 - alpha-Ca2SiO4 and beta-(Ca, Mg)3(PO4)2. The formation of more fluorine-rich apatite during heating was established.