Potter, Russell M. and Rossman, George R. (1979) A magnesium analogue of chalcophanite in manganese-rich concretions from Baja California. American Mineralogist, 64 (11-12). pp. 1227-1229. ISSN 0003-004X. https://resolver.caltech.edu/CaltechAUTHORS:20130514-081805265
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Abstract
Concretions which carry chemical remanent magnetization in sediments in Baja California, Mexico, previously called "hydropsilomelane," were found to consist of siltstone matrix minerals cemented by a manganese oxide. The X-ray powder pattern, infrared spectra, and chemical analyses indicate that the manganese oxide has the chalcophanite structure. The high concentration of magnesium, presumed to occur in the interlayer position of this mineral, suggests that it is the magnesium analogue of chalcophanite and extends the known range of substitution in chalcophanite-structure minerals.
| Item Type: | Article | ||||||
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| Additional Information: | © 1979 Mineralogical Society of America. Manuscript received, December 14, 1978; accepted for publication, March 27, 1979. We thank E. E. Larson (University of Colorado) for the samples of concretions used in this study. | ||||||
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| Issue or Number: | 11-12 | ||||||
| Record Number: | CaltechAUTHORS:20130514-081805265 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130514-081805265 | ||||||
| Official Citation: | A magnesium analogue of chalcophanite in manganese-rich concretions from Baja California Russell M. Potter and George R Rossman 1227-1229, 1979 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 38478 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Ruth Sustaita | ||||||
| Deposited On: | 14 May 2013 15:45 | ||||||
| Last Modified: | 26 Nov 2019 11:15 |
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