Abstract

Re-examination of nephelinite from Little Mount Cameroon (Etinde) has shown that the feldspathoid mineral is actually nepheline and not orthorhombic KAlSiO 4 as has been occasionally suggested. Chemical data are given, and a comparison is made with nepheline contained in mariupolite from the Vaal river region, Transvaal, South Africa. Also included is an analysis of nepheline syenite pegmatite from Cul Mor, Rossshire, Scotland, now available.

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