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High resolution transmission electron microscope study of exsolution in synthetic pigeonite

H. Feuer, L. Schroepfer, H. Fuess and D. A. Jefferson
High resolution transmission electron microscope study of exsolution in synthetic pigeonite
European Journal of Mineralogy (August 1989) 1 (4): 507-516

Abstract

The exsolution products in synthetic pigeonite of composition Wo (sub 6-9) En (sub 75-79) Fs (sub 15-16) have been characterized by HRTEM. The pyroxenes were prepared from the melt and cooled to room T at a rate of 8 degrees /h. Antiphase domain boundaries, 'tweed' patterns due to spinodal decomposition, coarse augite exsolution lamellae approx approximately equals two perpendicular bars (001) and (100), and augite-like platelets with a distinct S-shaped morphology have been observed in pigeonites which are in contact with orthopyroxene (Wo (sub 4) En (sub 83) Fs (sub 13) ). Diffraction patterns of these platelets display streaks and satellite reflections convoluted about the reciprocal lattice of the pigeonite host. These satellites reflect shape, orientation and periodic arrangement of the precipitates which are approx approximately equals two perpendicular bars (101); lattice images suggest a C-centred pyroxene structure (augite related).


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 1
Serial Issue: 4
Title: High resolution transmission electron microscope study of exsolution in synthetic pigeonite
Affiliation: Univ. Frankfurt, Inst. Kristallogr. Mineral., D-6000 Frankfurt/M., Federal Republic of Germany
Pages: 507-516
Published: 198908
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 24
Accession Number: 1993-015437
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany
Update Code: 1993
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