Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter March 28, 2015

Equations of state of ZrSiO4phases in the upper mantle

  • Shigeaki Ono EMAIL logo , Yoshinori Tange , Ikuo Katayama and Takumi Kikegawa
From the journal American Mineralogist

Abstract

The compressibility of zircon and reidite (ZrSiO4) was investigated by powder X-ray diffraction (XRD) up to 20 GPa using a synchrotron radiation source. Reliable equations of state for zircon and reidite were obtained using a diamond anvil cell (DAC) coupled with yttrium-aluminum-garnet (YAG) laser-heating. Samples were heated with the laser at each pressure increment to relax deviatoric stress. XRD measurements were carried out at 300 K using an angle-dispersive technique. Data refinements yield third-order Birch-Murnaghan equations of state parameters: the bulk modulus K0 = 205(±8) GPa when the first pressure derivative of the bulk modulus, K0', is fixed at 4 for zircon, K0 = 392(±9) when K0' is fixed at 4 for reidite. The volume reduction of the phase transition from zircon to reidite is about 10%. The tentative phase boundary between zircon and reidite is located at about 10 GPa.

Received: 2003-3-6
Accepted: 2003-6-9
Published Online: 2015-3-28
Published in Print: 2004-1-1

© 2015 by Walter de Gruyter Berlin/Boston

Downloaded on 28.3.2024 from https://www.degruyter.com/document/doi/10.2138/am-2004-0121/html
Scroll to top button