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Compressibility of the high-pressure polymorph of AlOOH to 17 GPa

Published online by Cambridge University Press:  05 July 2018

A. Suzuki
A. Suzuki*
Affiliation:
Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Sendai 980- 8578, Japan
*
* E-mail: [email protected]
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Abstract

The equation of state of δ-AlOOH was investigated using powder X-ray diffraction up to 17 GPa. Measurement of the volume at 300 K gave a value of the bulk modulus of K0 = 124(2) GPa, whereas its pressure derivative was K’ = 13.5(7). The b axis of the unit cell is more compressible than the a and c axes – in agreement with a neutron diffraction study at high pressure by Sano-Furukawa et al. (2008). Measurements presented here show that δ-AlOOH has a compressibility 200% higher than in the previously reported equation of state by Vanpeteghem et al. (2002).

Keywords

AlOOHhigh pressureX-ray diffractionequation of state.
Type
Research Article
Information
Mineralogical Magazine , Volume 73 , Issue 3 , June 2009 , pp. 479 - 485
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2009

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