Goldman, Don S. and Rossman, George R. and Parkin, Kathleen M. (1978) Channel Constituents in Beryl. Physics and Chemistry of Minerals, 3 (3). pp. 225-235. ISSN 0342-1791. https://resolver.caltech.edu/CaltechAUTHORS:20140226-111341364
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Abstract
The electronic absorption spectra of Fe^(2+) in non-chromium beryls are examined. Fe^(2+) in the Al-rich six-coordinate site produces absorption bands at about 820 nm and 970 nm polarized EIIc. Fe^(2+) in the channel produces bands at 820 nm (⊥c) and 2100 nm (IIc). Some blue beryls which are more intensely colored than most aquamarines, have an absorption band at ∼700 nm (‖c) which is suggested to arise from an Fe^(2+)/Fe^(3+) intervalence interaction. Fe^(2+) in both the six-coordinate site and the channel is identified in the Mössbauer spectra. The Mössbauer spectra of deep blue beryls are unusual and have not been satisfactorily explained. Color changes which accompany heating and irradiation are strongly influenced by the channel iron.
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| Additional Information: | © 1978 Springer-Verlag. Received December 19, 1977. We thank R. H. Currier (Arcadia, California) for providing samples of beryl for use in this study. Portions of this research were supported by the Earth Sciences Section, National Science Foundation, NSF Grant EAR76-02014, and the National Aeronautics and Space Administration, NASA Grant NGR 22-009-551. | |||||||||
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| Issue or Number: | 3 | |||||||||
| Record Number: | CaltechAUTHORS:20140226-111341364 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140226-111341364 | |||||||||
| Official Citation: | Channel constituents in beryl S. Don Goldman, George R. Rossman, Kathleen M. Parkin Pages 225-235 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 44016 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 26 Feb 2014 20:56 | |||||||||
| Last Modified: | 26 Nov 2019 11:15 |
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