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Willemite from the Ilímaussaq alkaline Intrusion

Published online by Cambridge University Press:  05 July 2018

John Metcalf-Johansen
John Metcalf-Johansen*
Affiliation:
Department of Physics, University of Warwick, Coventry
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Summary

During the summer of 1967 willcmite was found for the first time in the Ilímaussaq alkaline intrusion, South Greenland. The willemite occurs in an albitite together with aegirine/acmite, albite, analcime, arfvedsonite, apatite, chkalovite, hemimorphite, microcline, monazite, natrolite, naujakasite, neptunite, sphalerite, and polylithionite. Analytical, optical, and X-ray data were obtained from the willemite. Willemite from a calcite vein at Franklin Furnace, New Jersey, and from a quartz vein at Mussartût, South Greenland, were also examined.

One of the willemite crystals from Ilimaussaq was a trilling on <100>. This is the first time willemite has been found as a trilling.

Type
Research Article
Information
Mineralogical Magazine , Volume 41 , Issue 317 , March 1977 , pp. 71 - 75
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1977

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