High Pressure and High Temperature Equations of State of Majorite

  1. Murli H. Manghnani and
  2. Yasuhiko Syono
  1. Takehiko Yagii1,
  2. Masaki Akaogi2,
  3. Osamu Shimomurad3,
  4. Hiroshi Tamai4 and
  5. Syun-Iti Akimoto5

Published Online: 21 MAR 2013

DOI: 10.1029/GM039p0141

High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto

High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto

How to Cite

Yagii, T., Akaogi, M., Shimomurad, O., Tamai, H. and Akimoto, S.-I. (2013) High Pressure and High Temperature Equations of State of Majorite, in High-Pressure Research in Mineral Physics: A Volume in Honor of Syun-iti Akimoto (eds M. H. Manghnani and Y. Syono), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM039p0141

Author Information

  1. 1

    The Research Institute for Iron, Steel and Other Metals, Tohoku University, Katahira, Sendai 980, Japan

  2. 2

    Department of Earth Sciences, Kanazawa University, Kanazawa 920, Japan

  3. 3

    National Institute for Research in Inorganic Materials, Sakura-Mura, Niihari-Gun, Ibaraki 305, Japan

  4. 4

    Department of Earth Sciences, Chiba University, Chiba 260, Japan

  5. 5

    Institute for Solid State Physics, University of Tokyo, Minato-Ku, Tokyo 106, Japan

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1987

ISBN Information

Print ISBN: 9780875900667

Online ISBN: 9781118664124

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Keywords:

  • Mineralogy and Crystal Chemistry;
  • Phase transformations;
  • High Pressure-High Temperature Research

Summary

Bulk modulus and thermal expansion of pyrope, almandine, and two majorites, with the compositions 58% enstatite-42% pyrope solid solution and 18% ferrosilite-82% almandine solid solution, were measured using a cubic-anvil type of high-pressure and high-temperature X-ray diffraction apparatus combined with synchrotron radiation. Based on these measurements, we established the systematics of the elastic property in pyroxene-garnet join.

It was found that dissolution of the pyroxene component in garnet decreases the bulk modulus. This result is contrary to previously reported results, and thus gives new constraints to the model of the earth's mantle. It was also found that thermal expansion of garnet changes very little with dissolution of the pyroxene component. The volume dependence of thermal expansion for garnet was also measured.