Structural Study of δ-AlOOH Up to 29 GPa

Titelangaben

Simonova, Dariia ; Bykova, Elena ; Bykov, Maxim ; Kawazoe, Takaaki ; Simonov, Arkadiy ; Dubrovinskaia, Natalia ; Dubrovinsky, Leonid:
Structural Study of δ-AlOOH Up to 29 GPa.
In: Minerals. Bd. 10 (2020) Heft 12 . - No. 1055.
ISSN 2075-163X
DOI der Verlagsversion: https://doi.org/10.3390/min10121055

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Abstract

A structure and equation of the state of δ-AlOOH has been studied at room temperature, up to 29.35 GPa, by means of single crystal X-ray diffraction in a diamond anvil cell using synchrotron radiation. Above ~10 GPa, we observed a phase transition with symmetry changes from P21nm to Pnnm. Pressure-volume data were fitted with the second order Birch-Murnaghan equation of state and showed that, at the phase transition, the bulk modulus (K0) of the calculated wrt 0 pressure increases from 142(5) to 216(5) GPa.