The Relationship of Orthopyroxene to Pigeonite

Arie Poldervaart
Geology Department, University of Cape Town
Communicated by Prof. F. Walker

Abstract: A new classification of the orthopyroxene series is suggested. Two analyses of magnesian orthopyroxenes are given, and curves are drawn to correlate the chemical composition with the optical properties. The stability fields of orthopyroxenes and pigeonites are discussed in detail.

Mineralogical Magazine; September 1947 v. 28; no. 198; p. 164-172; DOI: 10.1180/minmag.1947.028.198.06
© 1947, The Mineralogical Society
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