High-pressure X-ray diffraction study and equation of state of MgSiO 3 ilmenite

Other| February 01, 1996 High-pressure X-ray diffraction study and equation of state of MgSiO3 ilmenite Bruno Reynard; Bruno Reynard Laboratoire de Mineraologie Physique, Geosciences Rennes, Rennes, France Search for other works by this author on: GSW Google Scholar Guillaume Fiquet; Guillaume Fiquet CNRS, France Search for other works by this author on: GSW Google Scholar Jean-Paul Itie; Jean-Paul Itie Universite Pierre et Marie Curie, France Search for other works by this author on: GSW Google Scholar David C. Rubie David C. Rubie Universitaet Bayreuth, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar American Mineralogist (1996) 81 (1-2): 45–50. https://doi.org/10.2138/am-1996-1-206 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Bruno Reynard, Guillaume Fiquet, Jean-Paul Itie, David C. Rubie; High-pressure X-ray diffraction study and equation of state of MgSiO3 ilmenite. American Mineralogist 1996;; 81 (1-2): 45–50. doi: https://doi.org/10.2138/am-1996-1-206 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyAmerican Mineralogist Search Advanced Search Abstract High-pressure X-ray powder diffraction data for MgSiO3 ilmenite have been collected up to 28 GPa using a diamond-anvil cell in an energy-dispersive configuration at the storage ring DCI at the LURE (Orsay, France). H2O was used as a pressure-transmitting medium. Pressures were measured using the ruby-fluorescence method or estimated from the equation of state of ice VII. Both pressure determinations are in good agreement up to 15 GPa but diverge at higher pressures because of the development of nonhydrostatic stresses and pressure gradients marked by an increase of the ruby-fluorescence line width. No phase changes are observed during compression or decompression. The compression of MgSiO3 ilmenite is anisotropic, with the c axis being twice as compressible as the a axis. The high-pressure volume data were fitted to a third-order Birch-Mumaghan equation of state and are consistent with the former determination of K0 = 212 GPa by Brillouin scattering; the data yield K′0 = 7.5(10) if the ruby-fluorescence pressures are used or K′0 = 5.6(10) if the pressures obtained from the equation of state of ice VII are used; the latter value is preferred because pressures were determined on the X-ray spot. The effects of nonhydrostatic stresses and pressure gradients on the determination of equations of state are discussed. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article.