Structure refinement of bazzite from pegmatitic and miarolitic occurrences

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doi: 10.2113/gscanmin.38.6.1419
Authors:Demartin, F.; Gramaccioli, C. M.; Pilati, T.
Author Affiliations:Primary:
Universita degli Studi, Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Milan, Italy
Other:
CNR, Italy
Volume Title:Canadian Mineralogist
Source:The Canadian Mineralogist, Vol.38(Part 6), p.1419-1424. Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada. ISSN: 0008-4476
Publication Date:2000
Note:In English with French summary. 17 refs.; 5 tables
Summary:The crystal structure of bazzite from miarolitic cavities in the Baveno granite (type locality), Piemonte, Italy, and from a pegmatitic occurrence at Tφrdal, Norway, has been refined. Compared to material from Alpine fissures, these specimens contain larger amounts of Rb, Cs and K in the channels and minor amounts of Mg in the dioctahedral positions. In the channels, the Na+ ions lie at the centre of the Si6O18 rings, i.e. in the Wyckoff position b, whereas H2O and the heavier alkali ions occupy the a position. The possibility of partial substitution of Si by Be has not been confirmed. [R.A.H.]
Sections:Crystal structure
Subsections:Specific structures: silicates
Subjects:Chemical composition; Crystal chemistry; Crystal structure; Electron probe data; Geochemistry; Granites; Igneous rocks; Metals; Pegmatite; Petrography; Plutonic rocks; Rare earths; Refinement; Scandium; Silicates; Europe; Italy; Norway; Scandinavia; Southern Europe; Western Europe; Baveno Italy; Bazzite; Tordal Norway
Abstract Numbers:01M/2516
Record ID:2001066986
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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