Nuclear reaction analysis of hydrogen in almandine, pyrope, and spessartite garnets

Abstract

The hydrogen concents of a series of almandine, pyrope, and spessartite garnets were determined with the ^(15)nuclear profiling method. The H contents, ex­pressed as H_2O, ranged up to 0.12 wt.% for one spessartite, but were normally in the 0.0x wt.% range. When the measured H contents were compared with infrared absorbance data, different calibration trends were obtained with the spessartine and almandine data. The pyrope garnets contain so little H (<0.02 wt.% H_2O) that satis­factory calibrations have not yet been obtained with the nuclear method.