Premium
Artificial Weathering of Oxidized Biotite: II. Rates of Dissolution in 0.1, 0.01, 0.001M HCl
Author(s) -
Gilkes R. J.,
Young R. C.,
Quirk J. P.
Publication year - 1973
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/sssaj1973.03615995003700010014x
Subject(s) - biotite , dissolution , ferric , ferric iron , weathering , chemistry , geology , mineralogy , inorganic chemistry , geochemistry , ferrous , organic chemistry , paleontology , quartz
Rates of dissolution of biotite in 0.1, 0.01, 0.001 M HCl decrease as the proportion of ferric iron in octahedrally coordinated sites increases. This is interpreted as being partly due to a decrease in the rate of K exchange from oxidized biotite so that a smaller surface area is exposed to acid attack. The availability of structural cations (Mg, Mn, Zn, K, etc.) to plants growing on biotite rich soils will be a function of the oxidation state of structural iron in the biotite.