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Ionic Properties of Mica Surfaces
Author(s) -
McDowell L. L.,
Marshall C. E.
Publication year - 1962
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/sssaj1962.03615995002600060011x
Subject(s) - phlogopite , muscovite , mica , vermiculite , biotite , rubidium , chemistry , ionic bonding , cationic polymerization , caesium , clay minerals , lithium (medication) , mineralogy , inorganic chemistry , potassium , materials science , geology , ion , geochemistry , quartz , polymer chemistry , metallurgy , organic chemistry , medicine , endocrinology , mantle (geology) , composite material
Seven micas were studied; muscovite, rose muscovite, phlogopite, margarite, biotite, lepidomelane, and a vermiculite‐biotite. Curves connecting selectivity number K s with surface cationic composition were obtained for Li‐Na, Li‐Rb, Li‐Cs, Ba‐Ca, and Ba‐Sr exchange equilibria. The polyfunctional character of the surfaces is well shown in the monovalent series. Cesium is held less firmly than rubidium at biotite, vermiculite‐biotite and lepidomelane surfaces, and more firmly only in the case of phlogopite. Margarite is entirely different from the other micas, in showing a high bonding for lithium, and an order NH 4 < Cs < Na < K < Rb. Potentiometric results, using clay membrane and silver electrodes, were obtained for Na + , Ag + and Ca ++ in 0.5% suspensions of the micas. The bonding energy curves also show the polyfunctional character of mica surfaces.