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Forces Involved in Ion Fixation by Vermiculite
Author(s) -
Kittrick J. A.
Publication year - 1966
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/sssaj1966.03615995003000060040x
Subject(s) - vermiculite , ion , attraction , chemical physics , molecule , chemistry , materials science , composite material , organic chemistry , linguistics , philosophy
The temperature at which vermiculite loses or gains an interlayer of water molecules was compared for a number of interlayer ion saturations. Results indicate the difference between contracting and expanding forces in vermiculite to be dependent upon interlayer ion charge, distance, and hydration energy. Important interlayer forces therefore must be electrostatic attraction between the negatively charged layers and the positive interlayer ions, and expansion due to ion hydration. Basically, ion fixation appears to occur when electrostatic forces of attraction exceed those of hydration