Abstract

Coexisting biotite, hastingsite and apatite in a granulitic charnockite from Eastern Ghats, India, contain large amounts of chlorine and fluorine. The chlorine content in biotite is one of the highest ever recorded in this mineral. The hastingsite composition is quite similar to that of other chlorhastingsites reported elsewhere, except that it contains fluorine. The apatite crystals contain rare earth elements in addition to halogens.

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