Fassaite


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Fas´sa`ite


n.1.(Min.) A variety of pyroxene, from the valley of Fassa, in the Tyrol.
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The succession during magmatic crystallization was as follows: microphenocrysts of salite to fassaite, feldspathoid and matrix assemblage of oligoclase-andesine mantled by Na-sanidine and titanomagnetite.
Strongly opacitized salite to sodic fassaite grains of matrix, rounded in shape and pale green in colour distinctly differ in their composition from clinopyroxene phenocrysts.
Zeolite-bearing trachyandesite from Dobranka, Ceske stredohori Mts.: petrography, geochemistry and amygdale mineralogy
35 (1997), (= edenite) 219 Fassaite Morimoto et al.: Min.
The IMA Commission on New Minerals and Mineral Names: Procedures and Guidelines on Mineral Nomenclature 1998

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