Abstract

A method for identification of plagioclase feldspars involves formation of a glass and determination of its refractive index. An investigation was made to test the reliability of the technique when samples are fused by an acetylene-air flame and in a high-temperature electric furnace. Specimens of albite from Quebec and labradorite from Newfoundland were used. No significant loss in Na or K occurred. Glasses formed by the fusion of the plagioclase powders under these conditions probably suffer no change in composition.

First Page Preview

First page PDF preview
You do not currently have access to this article.