Iron spin state in silicate perovskite at conditions of the Earth's deep interior

Catherine McCammon, Konstantin Glazyrin, Anastasia Kantor, Innokenty Kantor, Ilya Kupenko, Olga Narygina, Vasily Potapkin, Clemens Prescher, Ryosuke Sinmyo, Alexandr Chumakov, Rudolf Rüffer, Ilya Sergueev, Gennady Smirnov, Leonid Dubrovinsky

研究成果: Review article査読

21 被引用数 (Scopus)

抄録

We present a review of our recent work concerning the spin state of Fe 2+ and Fe3+ in iron magnesium aluminium silicate perovskite, the most abundant phase in the Earth's interior. Experimental results obtained using Mössbauer spectroscopy (with a radioactive source and a Synchrotron Mössbauer Source) and nuclear forward scattering for a range of different sample compositions in both externally heated and laser-heated diamond anvil cells show clear trends in the variation of hyperfine parameters with pressure and temperature. These trends combined with reported total spin state measurements using X-ray emission spectroscopy on samples of similar composition support the conclusion that Fe2+ undergoes a high-spin to intermediate-spin transition near the top of the lower mantle and an intermediate-spin to low-spin transition near the bottom of the lower mantle. No spin transition is observed to occur in Fe3+ for samples with compositions relevant for the lower mantle.

本文言語English
ページ(範囲)663-672
ページ数10
ジャーナルHigh Pressure Research
33
3
DOI
出版ステータスPublished - 20 8 2013

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