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Triclinic amphibole

Walter V. Maresch, Gerhard Miehe, Michael Czank, Hartmut Fuess and Werner Schreyer
Triclinic amphibole
European Journal of Mineralogy (October 1991) 3 (5): 899-903


A synthetic amphibole with composition near Na (sub 3) Mg (sub 5) [Si (sub 8) O (sub 21) (OH)](OH) (sub 2) has been shown by Rietveld refinement of XRD powder data to possess trinclinic symmetry. Electron diffraction indicates a superstructure with a three-fold b value. The structure transforms reversibly through a complex 60 degrees C transition zone to the common C2/m symmetry above approx 160 degrees C. The authors suggest that natural amphiboles with A sites filled with Na (super +) should be examined closely for evidence of triclinic symmetry.

ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 3
Serial Issue: 5
Title: Triclinic amphibole
Affiliation: Universitaet Muenster, Institut fuer Mineralogie, Munster, Federal Republic of Germany
Pages: 899-903
Published: 199110
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 11
Accession Number: 1995-056222
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Secondary Affiliation: Fachbereich Materialwissenschaft, DEU, Federal Republic of GermanyUniversitaet Kiel, DEU, Federal Republic of GermanyRuhr-Universitaet Bochum, DEU, Federal Republic of Germany
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199520
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