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The hydrous component in andradite garnet

Amthauer, Georg and Rossman, George R. (1998) The hydrous component in andradite garnet. American Mineralogist, 83 (7-8). pp. 835-840. ISSN 0003-004X.

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Twenty-two andradite samples from a variety of geological environments and two synthetic hydroandradite samples were studied by Fourier transform IR spectroscopy. Their spectra show that H enters andradite in the form of OH-. Amounts up to 6 wt% H_2O occur in these samples; those from low-temperature formations contain the most OH-. Some features in the absorption spectra indicate the hydrogarnet substitution (SiO_4)^(4-)↔(O_4H_4)^(4-) whereas others indicate additional types of OH- incorporation. The complexity of the spectra due to multi-site distribution of OH- increases with increasing complexity of the garnet composition.

Item Type:Article
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Rossman, George R.0000-0002-4571-6884
Additional Information:© 1998 Mineralogical Society of America. Manuscript received August 1, 1996. Manuscript accepted February 4, 1998. Paper handled by Anne M. Hofmeister. The authors thank G. Tippelt (Salzburg) for the hydroandradite synthesis and S. Ebner for typing the manuscript. We thank the Fulbright Commission and the Fonds zur Förderung der wissenschaftlichen Forschung in Vienna for financial support of GA through grant P10010GEO during his stay in Pasadena, and the National Science Foundation (U.S.A.) for support through grant no. EAR-9218980.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
Funding AgencyGrant Number
Fulbright CommissionUNSPECIFIED
Fonds zur Förderung der wissenschaftlichen ForschungP10010GEO
Issue or Number:7-8
Record Number:CaltechAUTHORS:20130502-093322305
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Official Citation: Georg Amthauer and George R. Rossman The hydrous component in andradite garnet American Mineralogist, August 1998, v. 83, p. 835-840
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38230
Deposited By: Ruth Sustaita
Deposited On:02 May 2013 16:51
Last Modified:03 Oct 2019 04:55

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