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@ARTICLE{Weber:281954,
      author       = {Weber, Juliane and Barthel, Juri and Brandt, Felix and
                      Klinkenberg, Martina and Breuer, Uwe and Kruth, Maximilian
                      and Bosbach, Dirk},
      title        = {{N}ano-structural features of barite crystals observed by
                      electron microscopy and atom probe tomography},
      journal      = {Chemical geology},
      volume       = {424},
      issn         = {0009-2541},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2016-01598},
      pages        = {51-59},
      year         = {2016},
      abstract     = {For the first time a barite samplewas investigated by
                      applying electronmicroscopy and atom probe tomographyin a
                      complementary approach to characterize its inner
                      microstructure. Pores covering the size range from a
                      fewnanometers to a few micrometers were identified inside
                      particles of a commercially available high purity barite.The
                      baritematrix appeared to be a single crystal. A particular
                      feature of the observed porous structure is a systemof
                      layers containing a high number of homogeneously distributed
                      nano-scale pores, alternating with layers containinga
                      limited number of larger pores. High-resolution chemical
                      analyses indicate that the pores contain a solutionof water
                      and sodium chloride. The filling of these nano-scale
                      inclusions was interpreted as residua of theinitial
                      supersaturated solution used for particle growth by
                      precipitation. These findings explain the high
                      reactivityobserved in previous Ra uptake studies on the same
                      type of barite and provide further implications for the
                      interpretationof these results. Our results offer a new
                      analytical approach and necessary reference data for future
                      investigationson changes of the internal barite structure
                      during these Ra uptake experiments.},
      cin          = {IEK-6 / ZEA-3 / PGI-5},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-6-20101013 / I:(DE-Juel1)ZEA-3-20090406 /
                      I:(DE-Juel1)PGI-5-20110106},
      pnm          = {161 - Nuclear Waste Management (POF3-161) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-161 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000370021200004},
      doi          = {10.1016/j.chemgeo.2016.01.018},
      url          = {https://juser.fz-juelich.de/record/281954},
}