High-pressure phase transition in brucite, Mg(OH)2

T. S. Duffy, C. Meade, Fei Yingwei Fei, Mao Ho-Kwang Mao, R. J. Hemley

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Abstract

Brucite was investigated by Raman spectroscopy to pressures of 36.6 GPa under nonhydrostatic conditions and to 19.7 GPa under quasi-hydrostatic conditions. Several new Raman lines are first observed at 4 GPa, demonstrating the existence of a high-pressure structural change. Raman data are compared with recent infrared spectroscopy, X-ray diffraction, and neutron diffraction studies of brucite. The structural change is likely to involve displacement or disordering of the H atoms, consistent with neutron diffraction results. -from Authors

Original languageEnglish (US)
Pages (from-to)222-230
Number of pages9
JournalAmerican Mineralogist
Volume80
Issue number3-4
DOIs
StatePublished - Jan 1 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

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    Duffy, T. S., Meade, C., Yingwei Fei, F., Ho-Kwang Mao, M., & Hemley, R. J. (1995). High-pressure phase transition in brucite, Mg(OH)2 American Mineralogist, 80(3-4), 222-230. https://doi.org/10.2138/am-1995-3-403