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Gobbinsite from Magheramorne Quarry, Northern Ireland

Published online by Cambridge University Press:  05 July 2018

Gilberto Artioli  and
Harry Foy
Gilberto Artioli
Affiliation:
Dipartimento di Scienze della Terra, Universiá di Milano, via Botticelli 23, I-20133 Milano, Italy
Harry Foy
Affiliation:
19 Wynard Park, Belfast BT5 6XS, Northern Ireland
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Abstract

The rare zeolite mineral gobbinsite has been found in vugs of altered basalts at the Magheramorne Quarry, Lane, Northern Ireland, intimately associated with phillipsite. The crystal chemistry of the sample (Na4.3Ca0.6Si10.4Al5.6O32·12H2O) is close to that reported for gobbinsite from the type locality. The crystal structure of the Magheramorne gobbinsite has been refined from X-ray powder diffraction data using the multiphase Rietveld full profile technique. The orthorhombic Pmn21 space group is confirmed. The refined cell parameters (a = 10.1027(5), b = 9.8016(5), and c = 10.1682(6) Å) are slightly different from those reported in the literature for the K-rich gobbinsite from Island Magee (a = 10.108(1), b = 9.766(1), and c = 10.171(1) Å), whose structure was also refined from powder data.

Keywords

gobbinsitezeoliteRietveld refinementcrystal structureMagheramorne Quarry
Type
Mineralogy
Information
Mineralogical Magazine , Volume 58 , Issue 393 , December 1994 , pp. 615 - 620
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1994

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