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Growth and sector zoning in a beryl crystal

Eugenio Scandale and Sergio Lucchesi
Growth and sector zoning in a beryl crystal
European Journal of Mineralogy (April 2000) 12 (2): 357-366


The structural defects and minor element distribution in a beryl crystal from Brumado, Bahia, Brazil, were studied by XRD topography and EPMA. The crystal growth occurred in two main stages, with significant differences in defect density and trace element concentrations, particularly Mg and Na. In the first growth stage, compositional variations and low defect density were noted, whereas in the second stage, there was a decrease in impurity content and a sharp rise in defect density. Reconstruction of the growth history allows the growth-sector boundaries to be located and related to compositional variations. In the first stage, trace element concentrations varied sharply across boundaries between the pinacoidal-pyramidal and pyramidal-prismatic growth sectors, but in the second stage they decreased smoothly in the prismatic sector.

ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 12
Serial Issue: 2
Title: Growth and sector zoning in a beryl crystal
Affiliation: Universita di Bari, Dipartimento Geomineralogio, Bari, Italy
Pages: 357-366
Published: 200004
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 30
Accession Number: 2000-041811
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
S18°19'60" - S08°19'60", W46°40'00" - W37°19'60"
Secondary Affiliation: Universita di Roma, ITA, Italy
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Update Code: 200014
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