Skip to Main Content
Skip Nav Destination
GEOREF RECORD

The thermoelastic properties of MgSO (sub 4) .7D (sub 2) O (epsomite) from powder neutron diffraction and ab initio calculation

Andrew D. Fortes, Ian G. Wood, Maria Alfredsson, Lidunka Vocadlo and Kevin S. Knight
The thermoelastic properties of MgSO (sub 4) .7D (sub 2) O (epsomite) from powder neutron diffraction and ab initio calculation
European Journal of Mineralogy (August 2006) 18 (4): 449-462

Abstract

Time-of-flight powder neutron diffraction has been used to measure the molar volume of MgSO (sub 4) . 7D (sub 2) O from 1.8-300 K at ambient pressure, fom 50-290 K at 1.4, 3.0 and 4.5 kbar, from 0-5.5 kbar at 290 K and from 0-4.5 kbar at 50 K. These data have allowed the determination of the temperature dependence of the incompressibility (thermodynamically equivalent to the pressure dependnce of the thermal expansion) of epsomite throughout its stability field. The a axis exhibits negative thermal expansion from 30 to 250 K at room pressure, turning positive above 250 K and being zero below 30 K. At below approximately 125 K, there are significant changes in the axial incompressibilities, with the a and c axes softening and the b axis stiffening.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 18
Serial Issue: 4
Title: The thermoelastic properties of MgSO (sub 4) .7D (sub 2) O (epsomite) from powder neutron diffraction and ab initio calculation
Affiliation: University College London, Research School of Geological and Geophysical Sciences, London, United Kingdom
Pages: 449-462
Published: 200608
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 63
Accession Number: 2006-069702
Categories: General geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables
Secondary Affiliation: Rutherford Appleton Laboratory, GBR, United KingdomNatural History Museum, GBR, United Kingdom
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200640
Close Modal

or Create an Account

Close Modal
Close Modal