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@ARTICLE{An:824328,
      author       = {An, Tao and Baikie, Tom and Orera, Alodia and Piltz, Ross
                      O. and Meven, Martin and Slater, Peter R. and Wei, Jun and
                      Sanjuán, María L. and White, T. J.},
      title        = {{I}nterstitial {O}xide {I}on {D}istribution and {T}ransport
                      {M}echanism in {A}luminum-{D}oped {N}eodymium {S}ilicate
                      {A}patite {E}lectrolytes},
      journal      = {Journal of the American Chemical Society},
      volume       = {138},
      number       = {13},
      issn         = {1520-5126},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2016-06937},
      pages        = {4468 - 4483},
      year         = {2016},
      abstract     = {Rare earth silicate apatites are one-dimensional channel
                      structures that show potential as electrolytes for solid
                      oxide fuel cells (SOFC) due to their high ionic conductivity
                      at intermediate temperatures (500–700 °C). This
                      advantageous property can be attributed to the presence of
                      both interstitial oxygen and cation vacancies, that create
                      diffusion paths which computational studies suggest are less
                      tortuous and have lower activation energies for migration
                      than in stoichiometric compounds. In this work, neutron
                      diffraction of Nd(28+x)/3AlxSi6–xO26 (0 ≤ x ≤ 1.5)
                      single crystals identified the locations of oxygen
                      interstitials, and allowed the deduction of a dual-path
                      conduction mechanism that is a natural extension of the
                      single-path sinusoidal channel trajectory arrived at through
                      computation. This discovery provides the most thorough
                      understanding of the O2– transport mechanism along the
                      channels to date, clarifies the mode of interchannel motion,
                      and presents a complete picture of O2– percolation through
                      apatite. Previously reported crystallographic and
                      conductivity measurements are re-examined in the light of
                      these new findings.},
      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          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000373748000034},
      pubmed       = {pmid:27015162},
      doi          = {10.1021/jacs.5b13409},
      url          = {https://juser.fz-juelich.de/record/824328},
}