Premium
Solubility Relationships of Fluorine Minerals in Soils
Author(s) -
Elrashidi M. A.,
Lindsay W. L.
Publication year - 1985
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1985.03615995004900050012x
Subject(s) - fluorapatite , solubility , soil water , fluorite , chemistry , mineralogy , apatite , supersaturation , fluorine , inorganic chemistry , geology , soil science , organic chemistry
Predictive models for the solubility of F minerals were developed and compared to the F solubility measurements made on 109 soils. The experimental findings indicate that AlF 3 (c) may be the solid phase controlling F solubility in strongly acid soils, CaF 2 (fluorite) in slightly acid soils, and KMg 3 AlSi 3 O 10 F 2 (fluorophlogopite) in neutral and alkaline soils. Although Ca 5 (PO 4 ) 3 F (fluorapatite) alone or in combination with hydroxyapatite is theoretically able to lower F activity in soils below that controlled by any of the aforementioned minerals, solubility measurements on all soils indicate supersaturation with respect to these apatite minerals.