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Compositional range of P2/n omphacite from the eclogitic rocks of central Shikoku, Japan
1976
Mineralogical magazine
The lattice types of omphacite-diopside series clinopyroxenes were determined for 9 Japanese, 2 Norwegian, and 1 South African samples. The boundary between the compositional ranges of P and C lattice clinopyroxenes lies at about 14·5 wt. % CaO in Japanese and Norwegian samples, and the compositional gap between them is very small, if it exists. The South African omphacite has C-lattice in the compositional range of P lattice omphacite in metamorphic eclogites. These data combined with the
doi:10.1180/minmag.1976.040.315.12
fatcat:ukhxcaengrhabakin2hzqktpe4