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@ARTICLE{Glazyrin:207295,
author = {Glazyrin, K. and Boffa Ballaran, T. and Frost, D. J. and
McCammon, C. and Kantor, A. and Merlini, M. and Hanfland, M.
and Dubrovinsky, L.},
title = {{M}agnesium {S}ilicate {P}erovskite and {E}ffect of {I}ron
{O}xidation {S}tate on its {B}ulk {S}ound {V}elocity at the
{C}onditions of the {L}ower {M}antle},
journal = {Earth and planetary science letters},
volume = {393},
issn = {0012-821X},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {PUBDB-2015-01278},
pages = {182 - 186},
year = {2014},
abstract = {A comprehensive understanding of the iron- and
aluminum-bearing magnesium silicate perovskite (Pv) crystal
structure and its evolution under pressure is vital for our
understanding of the deep Earth's lower mantle physics and
chemistry as well as for correct interpretation of seismic
data. In this study we investigate material with composition
relevant to subducted oceanic crust, by means of single
crystal X-ray diffraction at high pressure and high
temperature conditions. We found that (a) there is no spin
state crossover in ferric iron occupying the bicapped
trigonal prism (“A”) crystallographic site, and (b)
ferric iron does not enter the octahedral (“B”) site at
any conditions of our experiments. We constrain the thermal
equation of state for Pv with variable content of iron and
aluminum. For compositions of Pv relevant for Earth's lower
mantle, variation of Fe3+/ΣFe can lead to significant
changes of Pv bulk sound velocity (over $1\%),$
demonstrating the importance of iron oxidation state to the
interpretation of seismic tomography data.},
cin = {FS-PE},
ddc = {550},
cid = {I:(DE-H253)FS-PE-20120731},
pnm = {FS In-house research / external facilities (POF2-544)},
pid = {G:(DE-H253)POF2-Other-Beam-20130405},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000335103800020},
doi = {10.1016/j.epsl.2014.01.056},
url = {https://bib-pubdb1.desy.de/record/207295},
}