Geiger, Charles A. and Stahl, Andreas and Rossman, George R. (1999) Raspberry-red grossular from Sierra de Cruces Range, Coahuila, Mexico. European Journal of Mineralogy, 11 (6). pp. 1109-1113. ISSN 0935-1221. https://resolver.caltech.edu/CaltechAUTHORS:20130502-094830657
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Abstract
A raspberry-red grossular from the Sierra de Cruces Range in the state of Coahuila in Mexico has been investigated. Electron-microprobe analysis and ^(57)Fe Mòssbauer and UVYVIS spectroscopy were used in order to investigate the nature of the unusual red colour. The composition of the garnet is approximately (Ca_(2.94)Mg_(0.09)Mn^(2+)_(0.10))_(3.13)(Al_(1.90)Fe^(3+) _(0.05)Mn^(3+)_(0.01))_(1.96)Si_(2.97)O_(12). The UV/VIS spectrum is characterised by an absorption envelope centred around 19,000 cm1 in the green region, which can be fitted with two bands located at 19,503 and 17,302 cm^(-1), originating from two spin-allowed dd-electron transitions. They result from the presence of Mn^(3+) on the octahedral site of point symmetry 3.
| Item Type: | Article | ||||||
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| Additional Information: | © 1999 E. Schweizerbart'sche Verlagsbuchhandlung. Received 4 December 1998. Modified version received 6 May 1999. Accepted 18 May 1999. Work at Caltech was supported under a grant from the White Rose Foundation. | ||||||
| Group: | UNSPECIFIED, Division of Geological and Planetary Sciences | ||||||
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| Subject Keywords: | colour in minerals, garnet, UV/VIS spectroscopy, Mössbauer spectroscopy | ||||||
| Issue or Number: | 6 | ||||||
| Record Number: | CaltechAUTHORS:20130502-094830657 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130502-094830657 | ||||||
| Official Citation: | Charles A. Geiger, Andreas Stahl, and George R. Rossman Raspberry-red grossular from Sierra de Cruces Range, Coahuila, Mexico Eur J Mineral, December 1999, v. 11, p. 1109-1113 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 38231 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Ruth Sustaita | ||||||
| Deposited On: | 02 May 2013 17:10 | ||||||
| Last Modified: | 03 Oct 2019 04:55 |
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