Cation vacancy and possible hydrogen positions in hydrous forsterite, Mg1.985Si0.993H0.06O4, synthesized at 13.5GPa and 1300.DEG.C.

DOI 6 Citations 16 References
  • KUDOH Yasuhiro
    Institute of Mineralogy, Petrology, and Economic Geology, Faculty of Science, Tohoku University
  • KURIBAYASHI Takahiro
    Institute of Mineralogy, Petrology, and Economic Geology, Faculty of Science, Tohoku University
  • KAGI Hiroyuki
    Geochemical Laboratory, Graduate School of Science, The University of Tokyo
  • INOUE Toru
    Department of Earth Sciences, Ehime University

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  • Cation vacancy and possible hydrogen positions in hydrous forsterite, Mg1.985Si0.993H0.06O4, synthesized at 13.5 GPa and 1300 °C

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Abstract

The crystal structure of a single crystal of synthetic hydrous forsterite, (Mg1.985Si0.993H0.06O4), synthesized at T = 1300 °C and P = 13.5 GPa has been investigated using X-ray diffractometry and unpolarized infrared absorption spectroscopy. The data show an Mg atom occupancy of 98.6(2)% at the M(1) site and 99.9(2)% at the M(2) site, indicating that the cation vacancies predominantly occur at the M(1) site. A comparison of the calculated bond distances shows that the most probable H atom locations are at the O(2) and O(3) sites, where H may be located in association with the vacancy at the M(1) or the T site, forming hydrogen bonds between two oxygen pairs, O(3)-O(1) and O(2)-O(1), which correspond to the OH stretching vibrations at 3566 cm−1 and 3612 cm−1 observed in the IR spectra.

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Details 詳細情報について

  • CRID
    1390001206545537280
  • NII Article ID
    10018106152
  • NII Book ID
    AA11460926
  • DOI
    10.2465/jmps.101.265
  • COI
    1:CAS:528:DC%2BD2sXhtVGnuw%3D%3D
  • ISSN
    13493825
    13456296
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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