Spin transition and substitution of Fe3+ in Al-bearing post-Mg-perovskite

Kiyoshi Fujino; Daisuke Nishio-Hamane; Yasuhiro Kuwayama; Nagayoshi Sata; Sayaka Murakami; Matthew Whitaker; Ayako Shinozaki; Hiroaki Ohfuji; Yohei Kojima; Tetsuo Irifune; Nozomu Hiraoka; Hirofumi Ishii; Ku Ding Tsuei

doi:10.1016/j.pepi.2013.01.006

Spin transition and substitution of Fe³⁺ in Al-bearing post-Mg-perovskite

Kiyoshi Fujino, Daisuke Nishio-Hamane, Yasuhiro Kuwayama, Nagayoshi Sata, Sayaka Murakami, Matthew Whitaker, Ayako Shinozaki, Hiroaki Ohfuji, Yohei Kojima, Tetsuo Irifune, Nozomu Hiraoka, Hirofumi Ishii, Ku Ding Tsuei

SCI - Earth Science

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

4 Citations (Scopus)

Abstract

The spin transition and substitution of Fe³⁺ in Mg_0.85Fe³⁺_0.15Al_0.15Si_0.85O₃ post-Mg-perovskite (PPv) synthesized at 165-170GPa, 2100K were examined by X-ray emission spectroscopy (XES) and X-ray diffraction (XRD) during decompression to 37GPa without annealing. XRD showed that samples were single phase PPv down to 49GPa, although the samples may have partly become amorphous. The result of XES measurement indicates that Fe³⁺ is fully low spin (LS) for 165-100GPa and Fe³⁺ largely changes from LS to high spin (HS) between 80 and ∼40GPa. These results combined with previous reports indicate that Al and LS Fe³⁺ may occupy the A-(dodecahedral) and B-(octahedral) sites, respectively, as the favorable cation sites for 165-100GPa in Al-bearing PPv. Based on the present results on Fe³⁺ and recent theoretical reports on Fe²⁺, the spin states of iron in lower mantle PPv are discussed.

Original language	English
Pages (from-to)	31-35
Number of pages	5
Journal	Physics of the Earth and Planetary Interiors
Volume	217
DOIs	https://doi.org/10.1016/j.pepi.2013.01.006
Publication status	Published - 2013 Apr

Keywords

Fe-Al coupled substitution
Lower mantle
Post-perovskite
Spin state of Fe

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10.1016/j.pepi.2013.01.006

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@article{fbfd649684134a91a07cde800227caed,

title = "Spin transition and substitution of Fe3+ in Al-bearing post-Mg-perovskite",

abstract = "The spin transition and substitution of Fe3+ in Mg0.85Fe3+0.15Al0.15Si0.85O3 post-Mg-perovskite (PPv) synthesized at 165-170GPa, 2100K were examined by X-ray emission spectroscopy (XES) and X-ray diffraction (XRD) during decompression to 37GPa without annealing. XRD showed that samples were single phase PPv down to 49GPa, although the samples may have partly become amorphous. The result of XES measurement indicates that Fe3+ is fully low spin (LS) for 165-100GPa and Fe3+ largely changes from LS to high spin (HS) between 80 and ∼40GPa. These results combined with previous reports indicate that Al and LS Fe3+ may occupy the A-(dodecahedral) and B-(octahedral) sites, respectively, as the favorable cation sites for 165-100GPa in Al-bearing PPv. Based on the present results on Fe3+ and recent theoretical reports on Fe2+, the spin states of iron in lower mantle PPv are discussed.",

keywords = "Fe-Al coupled substitution, Lower mantle, Post-perovskite, Spin state of Fe",

author = "Kiyoshi Fujino and Daisuke Nishio-Hamane and Yasuhiro Kuwayama and Nagayoshi Sata and Sayaka Murakami and Matthew Whitaker and Ayako Shinozaki and Hiroaki Ohfuji and Yohei Kojima and Tetsuo Irifune and Nozomu Hiraoka and Hirofumi Ishii and Tsuei, {Ku Ding}",

note = "Funding Information: We thank Y. Ohishi at Spring-8 for his help in the X-ray diffraction experiments, and J.F. Lin for discussion. Comments by K. Hirose and an anonymous reviewer improved the manuscript. This work was supported by the Grant-in-Aid (No. 21540491) by the Japan Society for the Promotion of Science (JSPS). The X-ray emission spectroscopy experiments were performed under the approvals of NSRRC (Proposal No. 2008-3-032-5 and 2008-3-032-6) and JASRI (No. 2009B4267 and 2010A4251), while the X-ray diffraction experiments were carried out under the approval of JASRI (No. 2009B1080 and 2010A1545).",

year = "2013",

month = apr,

doi = "10.1016/j.pepi.2013.01.006",

language = "English",

volume = "217",

pages = "31--35",

journal = "Physics of the Earth and Planetary Interiors",

issn = "0031-9201",

publisher = "Elsevier",

}

TY - JOUR

T1 - Spin transition and substitution of Fe3+ in Al-bearing post-Mg-perovskite

AU - Fujino, Kiyoshi

AU - Nishio-Hamane, Daisuke

AU - Kuwayama, Yasuhiro

AU - Sata, Nagayoshi

AU - Murakami, Sayaka

AU - Whitaker, Matthew

AU - Shinozaki, Ayako

AU - Ohfuji, Hiroaki

AU - Kojima, Yohei

AU - Irifune, Tetsuo

AU - Hiraoka, Nozomu

AU - Ishii, Hirofumi

AU - Tsuei, Ku Ding

N1 - Funding Information: We thank Y. Ohishi at Spring-8 for his help in the X-ray diffraction experiments, and J.F. Lin for discussion. Comments by K. Hirose and an anonymous reviewer improved the manuscript. This work was supported by the Grant-in-Aid (No. 21540491) by the Japan Society for the Promotion of Science (JSPS). The X-ray emission spectroscopy experiments were performed under the approvals of NSRRC (Proposal No. 2008-3-032-5 and 2008-3-032-6) and JASRI (No. 2009B4267 and 2010A4251), while the X-ray diffraction experiments were carried out under the approval of JASRI (No. 2009B1080 and 2010A1545).

PY - 2013/4

Y1 - 2013/4

N2 - The spin transition and substitution of Fe3+ in Mg0.85Fe3+0.15Al0.15Si0.85O3 post-Mg-perovskite (PPv) synthesized at 165-170GPa, 2100K were examined by X-ray emission spectroscopy (XES) and X-ray diffraction (XRD) during decompression to 37GPa without annealing. XRD showed that samples were single phase PPv down to 49GPa, although the samples may have partly become amorphous. The result of XES measurement indicates that Fe3+ is fully low spin (LS) for 165-100GPa and Fe3+ largely changes from LS to high spin (HS) between 80 and ∼40GPa. These results combined with previous reports indicate that Al and LS Fe3+ may occupy the A-(dodecahedral) and B-(octahedral) sites, respectively, as the favorable cation sites for 165-100GPa in Al-bearing PPv. Based on the present results on Fe3+ and recent theoretical reports on Fe2+, the spin states of iron in lower mantle PPv are discussed.

AB - The spin transition and substitution of Fe3+ in Mg0.85Fe3+0.15Al0.15Si0.85O3 post-Mg-perovskite (PPv) synthesized at 165-170GPa, 2100K were examined by X-ray emission spectroscopy (XES) and X-ray diffraction (XRD) during decompression to 37GPa without annealing. XRD showed that samples were single phase PPv down to 49GPa, although the samples may have partly become amorphous. The result of XES measurement indicates that Fe3+ is fully low spin (LS) for 165-100GPa and Fe3+ largely changes from LS to high spin (HS) between 80 and ∼40GPa. These results combined with previous reports indicate that Al and LS Fe3+ may occupy the A-(dodecahedral) and B-(octahedral) sites, respectively, as the favorable cation sites for 165-100GPa in Al-bearing PPv. Based on the present results on Fe3+ and recent theoretical reports on Fe2+, the spin states of iron in lower mantle PPv are discussed.

KW - Fe-Al coupled substitution

KW - Lower mantle

KW - Post-perovskite

KW - Spin state of Fe

UR - http://www.scopus.com/inward/record.url?scp=84875177246&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875177246&partnerID=8YFLogxK

U2 - 10.1016/j.pepi.2013.01.006

DO - 10.1016/j.pepi.2013.01.006

M3 - Article

AN - SCOPUS:84875177246

SN - 0031-9201

VL - 217

SP - 31

EP - 35

JO - Physics of the Earth and Planetary Interiors

JF - Physics of the Earth and Planetary Interiors

ER -

Spin transition and substitution of Fe³⁺ in Al-bearing post-Mg-perovskite

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Keywords

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