SILICATES of the amphibole group are known to decompose endothermically, at temperatures above 600° C, to give a pyroxene and other products 1–3. The composition of the pyroxene and other ...
Aus tralian petrologists may consider that there is inadequate notice of the alkaline igneous rocks and in an effort at simplification “pyroxene (augite)” is included in the hornblende group ...