The shock wave equation of state of brucite Mg(OH)2

T. S. Duffy, T. J. Ahrens, M. A. Lange

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New equation of state (EOS) data for brucite Mg(OH)2 shocked between 12 and 60 GPa are reported. When combined with earlier data of Simakov et al. (1974), it is found that brucite EOS data between 12 and 97 GPa can be fit with a single linear Us-up relationship: Us=4.76(0.11)+1.35(0.05)up. The third order Birch-Murnaghan equation parameters are: Kos=51±4 GPa and K′os=5.0±0.4. Calculated phase boundaries using the present EOS data are consistent with experimental data and indicate that brucite is unlikely to be stable under lower mantle conditions. However, brucite data, in conjunction with data for silicates and oxides, can be used to infer the effect of H2O on lower mantle properties. -from Authors

Original languageEnglish (US)
Pages (from-to)14,319-14,330
JournalJournal of Geophysical Research
Issue numberB9
StatePublished - 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology


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