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The equilibrium diaspore-corundum at high pressures

Thomas Fockenberg, Bernd Wunder, Klaus-Dieter Grevel and Michael Burchard
The equilibrium diaspore-corundum at high pressures
European Journal of Mineralogy (December 1996) 8 (6): 1293-1299

Abstract

The equilibrium curve 2 diaspore = corundum + H (sub 2) O has been investigated experimentally by reversed runs in a piston-cylinder apparatus in the range 15-50 kbar. Its position is given by reversal brackets at 15 kbar (488-519 degrees C), 25 kbar (581-600 degrees C), 30 kbar (629-648 degrees C), 40 kbar (675-696 degrees C) and 50 kbar (695-719 degrees C), thus lying between the curves of Kennedy (1959) and Matushima et al. (1967). In addition, the behaviour of diaspore during heating at 1 atm was determined using a Guinier camera with a heating device. The resulting regression function for the volume has a higher slope in T than that estimated by Berman (1988). This newly determined function has been satisfactorily used, in conjunction with isothermal compressibility and thermodynamic data, to describe the experimental reversals obtained.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 8
Serial Issue: 6
Title: The equilibrium diaspore-corundum at high pressures
Affiliation: Ruhr-Universitaet Bochum, Institut fuer Mineralogie, Bochum, Federal Republic of Germany
Pages: 1293-1299
Published: 199612
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 27
Accession Number: 1997-018105
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: 2 tables
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199706
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