High Pressure Elastic Behavior of Synthetic Mg ₃ Y ₂ (SiO ₄ ) ₃ Garnet up to 9 GPa

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Advances in Materials Science and Engineering

DOI:https://doi.org/10.1155/2013/502702· OSTI ID:1227759

Fan, Dawei  ^[1]; Ma, Maining ^[2]; Wei, Shuyi ^[3]; Chen, Zhiqiang ^[4]; Xie, Hongsen ^[1]

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1. Laboratory for High Temperature and High Pressure Study of the Earth’s Interior of Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2. Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
3. Laboratory for High Temperature and High Pressure Study of the Earth’s Interior of Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China, University of Chinese Academy of Sciences, Beijing 100049, China
4. Department of Geosciences, Stony Brook University, Stony Brook, NY 11794, USA

The compression behavior of synthetic magnesium- (Mg-) yttrium (Y) garnet Mg ₃ Y ₂ (SiO ₄ ) ₃ has been investigated upto about 8.79 GPa at 300 K using in situ angle-dispersive X-ray diffraction and a diamond anvil cell at the beamline X17C, National Synchrotron Light Source, Brookhaven National Laboratory. No phase transition has been observed within the pressure range investigated. The unit-cell parameters and volume decreased systematically with increasing pressure, and a reliable isothermal bulk modulus ( $K_{T0}$ ) and its pressure derivative ( $K_{T0}^{\prime }$ ) were obtained in this study. The values of zero-pressure volume $V_0$ , $K_0$ , and $K_0^{\prime }$ refined with a third-order Birch-Murnaghan equation of state are $V_0$ $=1727.9\pm 0.2$  Å ³ , $K_{T0}$ $=145\pm 3$  GPa, and $K_0^{\prime }$ $=8.5\pm 0.9$ . If $K_{T0}^{\prime }$ is fixed at 4, $K_{T0}$ is obtained as $158\pm 2$  GPa.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-98CH10886
• OSTI ID: 1227759
• Journal Information: Advances in Materials Science and Engineering, Journal Name: Advances in Materials Science and Engineering Vol. 2013; ISSN 1687-8434
• Publisher: Hindawi Publishing Corporation
• Country of Publication: Egypt
• Language: English