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Characterization of Natural Chromite Samples from Ophiolite Complexes in the Philippines by 57Fe Mössbauer Spectroscopy

  • A. Kuno
  • R. A. Santos
  • M. Matsuo
  • B. Takano
Article

Abstract

Mössbauer spectroscopy was applied to natural chromite samples from ophiolite complexes in the Philippines. Chemical and structural characterization of the chromite samples was also carried out using X-ray absorption fine structure (XAFS), X-ray diffraction (XRD) and X-ray fluorescence spectrometry (XRF). The Mössbauer spectra of the samples consisted of quadrupole doublets ascribable to Fe3+ in octahedral site, Fe3+ in tetrahedral site, and Fe2+ in tetrahedral site. The relative percentage of Fe3+ and Fe2+ ions suggested that these Philippine samples were formed under relatively high oxygen fugacity.

Keywords

Oxygen Chromite Structural Characterization Fluorescence Spectrometry High Oxygen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó, Budapest 2000

Authors and Affiliations

  • A. Kuno
    • 1
  • R. A. Santos
    • 2
  • M. Matsuo
    • 2
  • B. Takano
    • 2
  1. 1.Graduate School of Arts and SciencesThe University of TokyoTokyoJapan
  2. 2.Graduate School of Arts and SciencesThe University of TokyoTokyoJapan

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