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Brewsterite-Ba and harmotome from the Wicklow lead mines, Co. Wicklow, Ireland

Green, D. I.; Tindle, A. G. and Moreton, S (2005). Brewsterite-Ba and harmotome from the Wicklow lead mines, Co. Wicklow, Ireland. Irish Journal of Earth Sciences, 23 pp. 101–106.

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The zeolite group minerals brewsterite–Ba and harmotome occur as minor latestage primary phases in the low-temperature Pb–Zn veins at Glendalough and Glendasan, Co. Wicklow. Brewsterite–Ba was identified on a single specimen from the Old Luganure Mine. Harmotome occurs at the Glendalough Mine, the Foxrock Mine and the Old Luganure Mine. Quantitative analyses of crystals of brewsterite–Ba reveal the most barium-rich composition yet reported: (Ba1.88, Sr0.02, K0.01, Na0.01) [Al4.03Si12.02O32]·nH2O. This is close to the hypothetical barium end member. The harmotome is also barium-rich. It contains lesser amounts of sodium and potassium, but no calcium. This is the first record of brewsterite–Ba from Ireland.

Item Type: Journal Article
Copyright Holders: 2005 Royal Irish Academy
ISSN: 2009-0064
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 14932
Depositing User: Elizabeth Lomas
Date Deposited: 23 Feb 2009 16:12
Last Modified: 26 Feb 2016 13:01
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