Pressure-induced phase transitions in alpha-ZrMo2O8

Muthu, DVS and Chen, B and Wrobel, JM and Andersen, Krogh AM and Carlson, S and Kruger, MB (2002) Pressure-induced phase transitions in alpha-ZrMo2O8. In: Physical Review B: Condensed Matter and Materials Physics, 65 (6). 064101.

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Abstract

We report high-pressure Raman, infrared (IR), and optical-absorption spectra of alpha-ZrMo2O8 (trigonal) up to 38 GPa at room temperature. The spectroscopic studies are consistent with diffraction results that show that alpha-ZrMo2O8 transforms into delta-ZrMo2O8 (monoclinic) at about 1 GPa and the delta phase converts to the epsilon phase (trielinic) at about 2.0 GPa. Optical-absorption measurements give an estimate of the band gap of about 0.6 eV at the lowest pressure. Band-gap changes with pressure are confirmed with visual observations. ZrMo2O8 changes from transparent at 5 GPa to yellow at 10 GPa, red at 18 GPa, and at about 30 GPa it becomes opaque.

Item Type:	Journal Article
Publication:	Physical Review B: Condensed Matter and Materials Physics
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jul 2011 09:36
Last Modified:	22 Jul 2011 09:36
URI:	http://eprints.iisc.ac.in/id/eprint/39365

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