Fluorescent X-Ray Spectrographic Analyses of Amphibolite Rocks and Constituent Hornblendes

Abstract

Fluorescent X-ray spectrographic analyses have been made for the oxides Fe₂O₃ caO, MgO, K₂O, TiO₂, and MnO on samples of amphibolite rock. In addition, the above oxides and SiO₂ and Al₂O₃ have been determined in a suite of constituent hornblendes from these rocks.Classical wet chemical analyses of materials of the same minera logical composition as the samples are used to establish the working curves. This eliminates the necessity for Internal standardization or other treatment of the samples. The only sample preparation involves extremely fine grinding before analysis.Precision of the analyses is equivalent to, or better than, that achieved by wet chemical methods.