Published January 1977
| public
Journal Article
The spectra of iron in orthopyroxene revisited: the splitting of the ground state
- Creators
- Goldman, Don S.
-
Rossman, George R.
Abstract
The optical absorption spectra of Fe^(2+) in the M(2) site of orthopyroxene have been reanalyzed, in view of the experimental observation of a mid-infrared band at 2350 cm^(-1) arising from an electronic transition within the split ^5T_(2g) ground state of the low-symmetry site. This analysis uses C_(2v) spectroscopic symmetry and a crystal-field potential which includes fourth-order harmonic terms. The order of the energy states is found to depend upon specific bond angles and lengths. The 2350 cm^(-1) band is assigned as a transition to the ^5B_2 state, calculated to lie above the ^5A_2 state. This result indicates that the entire splitting of the ^5T_(2g) ground state is 2350 cm^(-1).
Additional Information
© 1977 Mineralogical Society of America. Manuscript received, March 23, 1976; accepted for publication, July 21, 1976. We are indebted to Jeff Hare, Caltech, for numerous discussions concerning the point charge calculations and crystal-field interpretations of the orthopyroxene spectra. We thank Jack Huneke for the hypersthene sample from Oregon.Additional details
- Eprint ID
- 38446
- Resolver ID
- CaltechAUTHORS:20130513-110955692
- Created
-
2013-05-13Created 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
- Other Numbering System Name
- Caltech Division of Geological and Planetary Sciences
- Other Numbering System Identifier
- 2713