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Elastic anomalies in minerals due to structural phase transitions

Michael A. Carpenter and Ekhard K. H. Salje
Elastic anomalies in minerals due to structural phase transitions (in Phase transitions in minerals; strain and elasticity, Anonymous)
European Journal of Mineralogy (August 1998) 10 (4): 693-812

Abstract

Landau theory provides a formal basis for predicting the variations of elastic constants associated with phase transitions in minerals. These elastic constants can show substantial anomalies as a transition point is approached from either the high-symmetry side or the low-symmetry side. In the limiting case of proper ferroelastic behaviour, individual elastic constants, or some symmetry-adapted combination of them, can become very small if not actually go to zero. In this second review article, selected examples of 'ideal' behaviour for different driving order parameter, coupling behaviour and thermodynamic character are set out in full, with a level of detail intended to permit the important sequence of steps to be followed in each case. Anomalies in the elastic properties on a macroscopic scale can also be understood in terms of the properties of acoustic phonons. These microscopic processes must be considered if elastic anomalies due to dynamical effects are to be accounted for correctly. Albite is considered to provide a likely example of proper ferroelasticity in minerals, and values for the required coefficients, extracted from experimental data, yield a complete picture of the expected elastic properties. The beta [] alpha transition in quartz provides an example of co-elastic behaviour. Data for other compounds, including paratellurite and some with the perovskite-type structure, are reviewed to illustrate the full range of elastic anomalies to be expected at structural phase transitions in minerals.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 10
Serial Issue: 4
Title: Elastic anomalies in minerals due to structural phase transitions
Title: Phase transitions in minerals; strain and elasticity
Author(s): Carpenter, Michael A.Salje, Ekhard K. H.
Author(s): Anonymous
Affiliation: University of Cambridge, Department of Earth Sciences, England, United Kingdom
Pages: 693-812
Published: 199808
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 351
Accession Number: 1998-047261
Categories: General mineralogy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: 7 tables
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199818
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