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Large-angle convergent-beam electron diffraction (LACBED) characterization of (021) twinning in natural coesite

Damien Jacob, Patrick Cordier, Jean-Paul Morniroli and Hans-Peter Schertl
Large-angle convergent-beam electron diffraction (LACBED) characterization of (021) twinning in natural coesite
European Journal of Mineralogy (February 2008) 20 (1): 119-124

Abstract

Large-angle convergent-beam electron diffraction (LACBED) is used to characterize a (021) twinning in metamorphic coesite from Parigi, Dora-Maira Massif, Western Alps. The orientation relationships between the adjacent parts of the twin are characterized in detail and the twin is described as a mirror along (021). This microscopic description is fully consistent with original descriptions of twinning in synthetic coesite. Due to the quasi-hexagonal dimensions of coesite (belonging to the monoclinic space group C12/c1 with a approximately c and beta approximately 120 degrees ) such a result could not have been obtained using conventional electron diffraction experiments.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 20
Serial Issue: 1
Title: Large-angle convergent-beam electron diffraction (LACBED) characterization of (021) twinning in natural coesite
Affiliation: Universite des Sciences et Technologies de Lille, Laboratoire de Structure et Proprietes de l'Etat Solide, Villeneuve d'Ascq, France
Pages: 119-124
Published: 200802
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 15
Accession Number: 2008-072093
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N44°19'60" - N45°10'00", E07°04'60" - E07°25'00"
Secondary Affiliation: Ecole Nationale Superieure de Chimie de Lille, FRA, FranceRuhr-Universitaet Bochum, DEU, Federal Republic of Germany
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200819
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