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Redox equilibria of multivalent ions in silicate glassesExperimental studies were made on the compositional dependence of the redox equilibrium of Eu in synthetic silicate liquids, together with an empirical model describing the observed compositional dependence. Electron paramagnetic resonance (EPR) was used to measure the concentration ratio of Eu(2+) to Eu(3+) in various glasses formed by rapidly quenching silicate liquids. The compositional field studied comprised mixtures of SiO2, TiO2, Al2O3, CaO, MgO, and Na2O. The proposed model describes the Eu(2+)/Eu(3+) ratio over the entire compositional field in terms of parameters easily related to each glass composition. The general applicability and utility of the model is further demonstrated by its application to the Fe(2+)-Fe(3+), Ce(3+)-Ce(4+), and Cr(3+)-Cr(6+) redox reactions in binary alkali oxide silicate glasses of Li, Na, and K.
Document ID
19780027639
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lauer, H. V., Jr.
(Lockheed Electronics Co., Inc. Houston, Tex., United States)
Morris, R. V.
(NASA Johnson Space Center Geochemistry Branch, Houston, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
October 1, 1977
Publication Information
Publication: American Ceramic Society
Subject Category
Nonmetallic Materials
Accession Number
78A11548
Distribution Limits
Public
Copyright
Other

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