An IR absorption calibration for water in minerals

Other| December 01, 1997 An IR absorption calibration for water in minerals Eugen Libowitzky; Eugen Libowitzky Universitaet Wien-Geozentrum, Institut fuer Mineralogie und Kristallographie, Vienna, Austria Search for other works by this author on: GSW Google Scholar George R. Rossman George R. Rossman California Institute of Technology, United States Search for other works by this author on: GSW Google Scholar American Mineralogist (1997) 82 (11-12): 1111–1115. https://doi.org/10.2138/am-1997-11-1208 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Eugen Libowitzky, George R. Rossman; An IR absorption calibration for water in minerals. American Mineralogist 1997;; 82 (11-12): 1111–1115. doi: https://doi.org/10.2138/am-1997-11-1208 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyAmerican Mineralogist Search Advanced Search Abstract Using IR absorption data from polarized measurements on single-crystal minerals with stoichiometric water contents (in the form of H2O or OH groups in the structure), a linear calibration curve (r2 ≈ 0.98) for water in minerals is established in the form: ϵi (the integrated molar absorption coefficient in units of cm–2 per mol H2O/L) = 246.6(3753 – ν) (ν = 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. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.