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FELDSPATHOID

The 'feldspathoids' are a group of tectosilicate minerals which resemble feldspars but have a different structure and much lower silica content. They occur in rare and unusual igneous rocks.

Contents
Feldspathoid Minerals
Feldspathoid Minerals


Leucite

Nepheline

Analcime

Cancrinite

Hauyne

Lazurite

Nosean

Sodalite

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