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An IR absorption calibration for water in minerals

Libowitzky, Eugen and Rossman, George R. (1997) An IR absorption calibration for water in minerals. American Mineralogist, 82 (11-12). pp. 1111-1115. ISSN 0003-004X. https://resolver.caltech.edu/CaltechAUTHORS:20130501-141857850

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Abstract

Using IR absorption data from polarized measurements on single-crystal minerals with stoichiometric water contents (in the form of H_(2)O or OH groups in the structure), a linear calibration curve (r^2 nearly equal 0.98) for water in minerals is established in the form: epsilon i , (the integrated molar absorption coefficient in units of cm^(-2) per mol H_(2)O/L) = 246.6(3753 - upsilon ) (upsilon = the mean wavenumber of the OH stretching band [in cm^(-1)]). The investigated minerals include hydrogrossular, analcime, hemimorphite and its dehydrated phase, lawsonite, goethite, diaspore, manganite, mozartite, and pectolite. The influence of hydrogen bonding, leading to increased absorption values with lower OH stretching band energies, is confirmed. It is further shown that only the use of integrated absorbance values (band areas) results in a linear correlation with water content, whereas linear absorption data (peak heights) are not correlated. The calibration agrees with previously published quantitative IR data on staurolite and trace H in pyroxenes. It is also close to the frequently used trend of Paterson (1982). However, some of the previous calibrations of trace H in nominally anhydrous minerals, e.g., kyanite and pyrope, differ appreciably from the correlation derived from stoichiometrically hydrous minerals.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://ammin.geoscienceworld.org/content/82/11-12/1111.abstractPublisherUNSPECIFIED
ORCID:
AuthorORCID
Rossman, George R.0000-0002-4571-6884
Additional Information:© 1997 Mineralogical Society of America. Manuscript received March 19, 1997; manuscript accepted July 15, 1997. E.L. appreciates financial support from the "Fonds zur Förderung der wissenschaftlichen Forschung, Austria" during an Erwin-Schrödinger fellowship, project J01098-GEO. G.R.R. acknowledges financial support from the National Science Foundation, grant EAR-9218980. The constructive comments of J.-L. Robert, H. Keppler, and an anonymous referee helped to improve the quality of the manuscript.
Funders:
Funding AgencyGrant Number
Fonds zur Förderung der wissenschaftlichen ForschungUNSPECIFIED
Erwin-Schrödinger FellowshipJ01098-GEO
NSFEAR-9218980
Issue or Number:11-12
Record Number:CaltechAUTHORS:20130501-141857850
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130501-141857850
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38214
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:01 May 2013 23:03
Last Modified:03 Oct 2019 04:55

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