Published May 1975
| public
Journal Article
Joaquinite: The Nature of its Water Content and the Question of Four-Coordinated Ferrous Iron
- Creators
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Rossman, George R.
Chicago
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Abstract
The polarized optical and infrared spectra of oriented crystals of joaquinite from San Benito County, California, have been obtained. The infrared spectra have polarized absorption bands at 3561, 3500, and 1607 cm^(-1), which are assigned to the vibrations of crystallographically ordered molecular water in joaquinite. The optical spectra show features due to neodymimum and divalent iron. The near infrared absorptions near 1000 and 2100 nm are discussed in terms of six-coordinated iron(II) rather than the four-coordinated iron(II) proposed from X-ray structural studies.
Additional Information
© 1975 Mineralogical Society of America. Manuscript received September 20, 1974: accepted for publication, January 14, 1975. Mr. Buzz Gray, of the Dalles Gem Mine, provided most of the joaquinite specimens used in this study. Professor Fiorenzo Mazzi provided additional structural data regarding the iron site from his X-ray structure determination, and Jo Laird supplied information regarding her X-ray studies and chemical analyses and kindly reviewed the manuscript.Additional details
- Eprint ID
- 38326
- Resolver ID
- CaltechAUTHORS:20130507-113852531
- Created
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2013-05-07Created from EPrint's datestamp field
- Updated
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2019-11-26Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)
- Other Numbering System Name
- Caltech Division of Geological and Planetary Sciences
- Other Numbering System Identifier
- 2465