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@ARTICLE{Wiedemann:821015,
      author       = {Wiedemann, Dennis and Indris, Sylvio and Meven, Martin and
                      Pedersen, Björn and Boysen, Hans and Uecker, Reinhard and
                      Heitjans, Paul and Lerch, Martin},
      title        = {{S}ingle-crystal neutron diffraction on γ-{L}i{A}l{O}2:
                      structure determination and estimation of lithium diffusion
                      pathway},
      journal      = {Zeitschrift für Kristallographie / Crystalline materials},
      volume       = {231},
      number       = {3},
      issn         = {2196-7105},
      address      = {Berlin},
      publisher    = {De Gruyter},
      reportid     = {FZJ-2016-06272},
      pages        = {189–193},
      year         = {2016},
      abstract     = {γ-Lithium aluminum oxide is a paradigmatic example of an
                      ultraslow lithium ion conductor. This characteristic plays a
                      crucial role in its proposed and actual applications.
                      Herein, we report on the outcome of single-crystal neutron
                      diffraction studies at ambient and high temperature. Careful
                      evaluation confirms the commonly assumed room-temperature
                      structure as derived by powder neutron diffraction in 1965.
                      At 1043 K, a split of the lithium position hints at the
                      onset of intrinsic diffusion. Analysis of the negative
                      scattering-length density using the maximum-entropy method
                      (MEM) indicates a preference for a strongly curved diffusion
                      pathway traversing octahedral voids between adjacent lithium
                      sites. These results help to understand ultraslow lithium
                      diffusion in well-ordered ionic solids on the microscopic
                      scale and, ultimately, to establish structure–property
                      relationships.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101 / EXP:(DE-MLZ)RESI-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000371880500006},
      doi          = {10.1515/zkri-2015-1896},
      url          = {https://juser.fz-juelich.de/record/821015},
}