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The spectra of iron in orthopyroxene revisited: the splitting of the ground state

Goldman, Don S. and Rossman, George R. (1977) The spectra of iron in orthopyroxene revisited: the splitting of the ground state. American Mineralogist, 62 (1-2). pp. 151-157. ISSN 0003-004X. http://resolver.caltech.edu/CaltechAUTHORS:20130513-110955692

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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).


Item Type:Article
Related URLs:
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http://www.minsocam.org/msa/collectors_corner/amtoc/toc1977.htmPublisherUNSPECIFIED
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.
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Caltech Division of Geological and Planetary Sciences2713
Record Number:CaltechAUTHORS:20130513-110955692
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130513-110955692
Official Citation:The spectra of iron in orthopyroxene revisited: the splitting of the ground state Don S. Goldman and George K. Rossman 151-157, 1977
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38446
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 May 2013 18:26
Last Modified:13 Feb 2019 18:05

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