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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},
}