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Reactions in Crystalline Lattices: Chemistry of Lower Valence States of Lanthanides

Fong, Francis K. and Fenn, John B., Jr. and McCaldin, J. O. (1970) Reactions in Crystalline Lattices: Chemistry of Lower Valence States of Lanthanides. Journal of Chemical Physics, 53 (4). pp. 1559-1565. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:FONjcp70

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Abstract

Reduction of rare-earth (RE) ions to lower valence states in ionic crystals is described in terms of the equilibrium distribution theory for the (alkali halide):RE2+ and (alkaline-earth halide):RE3+ systems. Thermoluminescence glow curves of radiation-reduced CaF2:RE3+ systems reveal that the reoxidation of the divalent ions apparently occurs through thermal excitation of an f electron to the d bands. The additive reduction of RE2+ to the monovalent state in alkali halides yields striking results: While Sm1+ ions in KCl obtained by gamma radiation give rise to broad-band optical spectra which were attributed to 4f66s1 --> 4f56s2 transitions, those obtained through high-temperature additive treatment with liquid K give rise to narrow-line spectra that are not easily interpreted. These results illustrate well the major differences between the radiation reduction and additive reduction processes.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.1674213DOIUNSPECIFIED
http://link.aip.org/link/?JCPSA6/53/1559/1PublisherUNSPECIFIED
Additional Information:© 1970 American Institute of Physics. Received 20 April 1970. This research was supported under the ARPA Institutional Grant SD102.
Funders:
Funding AgencyGrant Number
Advanced Research Projects AgencySD102
Record Number:CaltechAUTHORS:FONjcp70
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:FONjcp70
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ID Code:12411
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Deposited On:24 Nov 2008 19:01
Last Modified:26 Dec 2012 10:31

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