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@ARTICLE{Kolesnikov:490520,
      author       = {Kolesnikov, E. and Kupenko, I. and Achorner, M. and
                      Plückthun, C. and Liermann, H.-P. and Merkel, S. and
                      Sanchez-Valle, C.},
      title        = {{S}trength and seismic anisotropy of textured {F}e{S}i at
                      planetary core conditions},
      journal      = {Frontiers in Earth Science},
      volume       = {10},
      issn         = {2296-6463},
      address      = {Lausanne},
      publisher    = {Frontiers Media},
      reportid     = {PUBDB-2022-07819},
      pages        = {974148},
      year         = {2022},
      abstract     = {Elastic anisotropy of iron-bearing alloys and compounds can
                      lead to a variation of seismic velocities along different
                      directions in planetary cores. Understanding the deformation
                      properties of candidate core-forming materials is thus
                      necessary to reveal the details about the interior of
                      distant planets. Silicon has been considered to be one of
                      the dominant light elements in the cores. Here we
                      investigated the deformation of the ε-FeSi phase up to 49
                      GPa and 1100 K employing the radial X-ray diffraction
                      technique in diamond anvil cells. Stoichiometric FeSi is a
                      good approximation for the deformation behavior of the
                      Fe-FeSi system and the low-pressure polymorph of FeSi may be
                      the stable phase in the cores of small terrestrial planets
                      such as Mercury. Yield strength in ε-FeSi is higher than in
                      hcp-Fe and hcp-Fe-Si alloys, in the temperature range we
                      investigated here the temperature has little influence on
                      the lattice strain parameters, yield strength, and
                      anisotropy within experimental precision. The azimuthal
                      anisotropy of the longitudinal sound waves in ε-FeSi is
                      below $0.6\%$ at low pressure and decreases further with
                      compression, while the shear wave contrast is below $1.25\%$
                      in the entire investigated pressure range. Therefore,
                      polycrystalline aggregates of iron silicide are nearly
                      isotropic at extreme conditions. Consequently, any observed
                      anisotropy in planetary cores will be incompatible with
                      silicon being the dominant light element in the core
                      composition.},
      cin          = {DOOR ; HAS-User / FS-PETRA-D},
      ddc          = {550},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-D-20210408},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      FS-Proposal: I-20170400 (I-20170400) / FS-Proposal:
                      I-20170881 (I-20170881)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
                      G:(DE-H253)I-20170400 / G:(DE-H253)I-20170881},
      experiment   = {EXP:(DE-H253)P-P02.2-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000890066800001},
      doi          = {10.3389/feart.2022.974148},
      url          = {https://bib-pubdb1.desy.de/record/490520},
}