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Ferrian chlorospinel from Carneal, Co. Antrim

Published online by Cambridge University Press:  14 March 2018

P. A. Sabine ,
G. A. Sergeant  and
B. R. Young
P. A. Sabine
Affiliation:
Institute of Geological Sciences, London S.W. 7
G. A. Sergeant
Affiliation:
Institute of Geological Sciences, London S.W. 7
B. R. Young
Affiliation:
Institute of Geological Sciences, London S.W. 7
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Summary

A Tertiary dolerite plug at Carneal, Co. Antrim has been contaminated by Chalk with the production of calc-silicates and related minerals. In a larnite-spinel-rock the spinel is of the unusual ferrian variety. It has the composition The spinel, which is brown, has: n, 1·862; D, 3·97; a, 8·1905 Å. A chemical analysis and powder data are given, the implications of experimental data are briefly discussed, and the nomenclature is reviewed.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 36 , Issue 283 , September 1968 , pp. 948 - 954
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1968

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