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GEOREF RECORD

Pressure-induced amorphization of minerals; a review

Pascal Richet and Philippe Gillet
Pressure-induced amorphization of minerals; a review
European Journal of Mineralogy (October 1997) 9 (5): 907-933

Abstract

A variety of minerals transform to an amorphous phase when statically compressed to a few tens of GPa. For quartz and the quartz-type forms of GeO (sub 2) and AlPO (sub 4) as examples, P-induced amorphization is described with reference to differential stress, crystalline transformations, compression mechanisms and shearing processes. Less information is available for the amorphization of other minerals, but similar features are observed for framework silicates, pyroxenes, olivines and hydrous silicates. The differences and similarities between amorphous substances obtained by cooling of liquids, static compression or decompression of crystals, moderate heating of high-P minerals at 1 atm, and shock waves are reviewed. Finally, the thermodynamics of amorphization is discussed and the mechanistic interpretations are presented, with special reference to elastic and dynamic instabilities and shearing processes.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 9
Serial Issue: 5
Title: Pressure-induced amorphization of minerals; a review
Affiliation: Institut de Physique du Globe, Laboratoire des Geomateriaux, Paris, France
Pages: 907-933
Published: 199710
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 146
Accession Number: 1997-077041
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Secondary Affiliation: CNRS, FRA, France
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199724
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