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Al-rich pyroxene and melilite in a blast-furnace slag and a comparison with the Allende meteorite

Published online by Cambridge University Press:  05 July 2018

B. C. M. Butler
B. C. M. Butler*
Affiliation:
Department of Geology and Mineralogy, Parks Road, Oxford OX1 3PR
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Summary

Fassaitic diopside containing 22–23 wt% Al2O3 (approximately 41–43% calcium Tschermak's molecule, CaAl2SiO6) and melilite containing 69–43% gehlenite crystallized from a blast-furnace slag at atmospheric pressure between about 1450°C and 1250°C. The occurrence is of petrological interest because the association of pyroxene with gehlenite-rich melilite has not been recorded from experimental studies in the system CaO-MgO-Al2O3-SiO2, and because of the similarity of the compositions of both minerals to pyroxene and melilite in the Ca-Al-rich inclusions of the Allende meteorite.

Type
Research Article
Information
Mineralogical Magazine , Volume 41 , Issue 320 , December 1977 , pp. 493 - 499
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1977

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