The integrated absorbance (total area under the curve in the OH region)
can be related to the H2O content of the garnet.
Infrared spectrum of synthetic katoite | The grossular calibration |
We can ask the following question: 'Does this calibration line
applies to low concentrations of OH in the nominally anhydrous minerals?'
Reference: Rossman GR, Aines RD (1991) The hydrous
components in garnets: grossular - hydrogrossular. American Mineralogist
76, 1153-1164.