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Effect of K + ‐Uptake by K + ‐Depleted Micas on the Basal Spacing
Author(s) -
Weed S. B.,
Leonard R. A.
Publication year - 1968
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/sssaj1968.03615995003200030023x
Subject(s) - mica , potassium , chemistry , alternation (linguistics) , octahedron , phase (matter) , crystallography , mineralogy , analytical chemistry (journal) , geology , materials science , chromatography , metallurgy , crystal structure , linguistics , philosophy , organic chemistry
Potassium was introduced into expanded, i.e., K + ‐depleted, micas by (i) adding about 0.5 symmetry of KCl to a chromatographic column of expanded mica plus sand and (ii) by equilibrating suspensions of Ca 2+ or Mg 2+ ‐saturated expanded mica with 0.5, 1.0, 1.5, or 2.0 symmetry of KCl. Two expanded biotites readily formed a regular alternation of 10 and 14A spacings whereas two muscovites did not develop such a phase. A phologopite yielded this phase only at the lowest concentration of K + tested. Regular alternation developed most readily in the Ca 2+ ‐saturated minerals. Development of regular interstratification did not appear to be related to the gross surface‐charge‐density of the minerals, but did seem to be positively related to the content of octahedral Fe.