Divalent chromium in ferropericlase inclusions in lower-mantle diamonds revealed by micro-XANES measurements

Shoko Odake; Satoshi Fukura; Masashi Arakawa; Atsuyuki Ohta; Ben Harte; Hiroyuki Kagi

doi:10.2465/jmps.080620d

Divalent chromium in ferropericlase inclusions in lower-mantle diamonds revealed by micro-XANES measurements

Shoko Odake, Satoshi Fukura, Masashi Arakawa, Atsuyuki Ohta, Ben Harte, Hiroyuki Kagi

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Chromium. K-edge X-ray absorption near-edge structure (XANES) spectra of natural ferropericlase were measured using an X-ray microbeam from a synchrotron radiation source to estimate the valence state of Cr. Measured samples were inclusions collected from lower-mantle diamonds. The obtained results revealed that divalent chromium is present in the materials in the lower mantle and that the proportion of Cr²+ in the total Cr content varied among the samples. The valence state of chromium in the inclusions in diamonds is a potential indicator of the redox conditions in the lower mantle.

Original language	English
Pages (from-to)	350-353
Number of pages	4
Journal	Journal of Mineralogical and Petrological Sciences
Volume	103
Issue number	5
DOIs	https://doi.org/10.2465/jmps.080620d
Publication status	Published - Dec 1 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Geophysics
Geology

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10.2465/jmps.080620d

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abstract = "Chromium. K-edge X-ray absorption near-edge structure (XANES) spectra of natural ferropericlase were measured using an X-ray microbeam from a synchrotron radiation source to estimate the valence state of Cr. Measured samples were inclusions collected from lower-mantle diamonds. The obtained results revealed that divalent chromium is present in the materials in the lower mantle and that the proportion of Cr2+ in the total Cr content varied among the samples. The valence state of chromium in the inclusions in diamonds is a potential indicator of the redox conditions in the lower mantle.",

author = "Shoko Odake and Satoshi Fukura and Masashi Arakawa and Atsuyuki Ohta and Ben Harte and Hiroyuki Kagi",

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T1 - Divalent chromium in ferropericlase inclusions in lower-mantle diamonds revealed by micro-XANES measurements

AU - Odake, Shoko

AU - Fukura, Satoshi

AU - Arakawa, Masashi

AU - Ohta, Atsuyuki

AU - Harte, Ben

AU - Kagi, Hiroyuki

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Chromium. K-edge X-ray absorption near-edge structure (XANES) spectra of natural ferropericlase were measured using an X-ray microbeam from a synchrotron radiation source to estimate the valence state of Cr. Measured samples were inclusions collected from lower-mantle diamonds. The obtained results revealed that divalent chromium is present in the materials in the lower mantle and that the proportion of Cr2+ in the total Cr content varied among the samples. The valence state of chromium in the inclusions in diamonds is a potential indicator of the redox conditions in the lower mantle.

AB - Chromium. K-edge X-ray absorption near-edge structure (XANES) spectra of natural ferropericlase were measured using an X-ray microbeam from a synchrotron radiation source to estimate the valence state of Cr. Measured samples were inclusions collected from lower-mantle diamonds. The obtained results revealed that divalent chromium is present in the materials in the lower mantle and that the proportion of Cr2+ in the total Cr content varied among the samples. The valence state of chromium in the inclusions in diamonds is a potential indicator of the redox conditions in the lower mantle.

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Divalent chromium in ferropericlase inclusions in lower-mantle diamonds revealed by micro-XANES measurements

Abstract

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