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Ultrasonic study of epsomite (MgSO4 center dot 7H2O) under pressure

Gromnitskaya, EL; Yagafarov, OF; Lyapin, AG; Brazhkin, VV; Fortes, AD; (2010) Ultrasonic study of epsomite (MgSO4 center dot 7H2O) under pressure. High Pressure Research , 30 (1) 51 - 54. 10.1080/08957951003588860.

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Abstract

We present an ultrasonic study of the elastic moduli of epsomite (MgSO4 center dot 7H2O) in the temperature range 77-295K at pressures up to 2.8GPa. Elastic properties of epsomite MgSO4 center dot 7D2O at room temperature conditions (p=0-2.8GPa) were also measured. The anomalies in dependencies of elastic characteristics were identified as phase transition points. Our research has shown that the elastic properties and the sequence of phase transitions for MgSO4 center dot 7H2O and MgSO4 center dot 7D2O are very similar at room temperature. The picture of transformations of the compressed epsomite significantly changes below 285K.

Type:Article
Title:Ultrasonic study of epsomite (MgSO4 center dot 7H2O) under pressure
Location:Univ Pierre & Marie Curie, Cordeliers Campus, Paris, FRANCE
DOI:10.1080/08957951003588860
Publisher version:http://dx.doi.org/10.1080/08957951003588860
Language:English
Keywords:elastic properties, ultrasonic method, epsomite, phase diagram
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences

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