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Al,Si order and the internal texture of prehnite

Mizuhiko Akizuki
Al,Si order and the internal texture of prehnite
The Canadian Mineralogist (December 1987) 25, Part 4: 707-716


Prehnite crystals from 'Glasgow', Scotland, were observed by high-resolution TEM, SEM and optical microscopy. Three polymorphs, Pncm, P2cm and P2/n, were observed in the (100) thin foils produced by ion thinning. The P2/n, polymorph consists of extremely fine polysynthetic twins parallel to the (001) plane, and the Pncm polymorph has fine lamellae consisting of the P2/n structure, whereas the P2cm polymorph is more or less homogeneous. The three polymorphs are metastably produced by a charge-balance effect on the crystal surface growth. Furthermore, the Pncm crystal, which consists of Al,Si disordered structure, transforms into the ordered P2/n crystal with fine twins. The P2cm structure may be maintained as it appears after growth, because of its homogeneous texture. [Author's abstract]

ISSN: 0008-4476
EISSN: 1499-1276
Coden: CAMIA6
Serial Title: The Canadian Mineralogist
Serial Volume: 25, Part 4
Title: Al,Si order and the internal texture of prehnite
Author(s): Akizuki, Mizuhiko
Affiliation: Tohoku Univ., Inst. Miner., Petrol., and Econ. Geol., Sendai, Japan
Pages: 707-716
Published: 198712
Text Language: English
Summary Language: French
Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada
References: 19
Accession Number: 1988-020306
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1988
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