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@INPROCEEDINGS{Meven:840616,
      author       = {Meven, Martin and Sazonov, Andrew and Roth},
      title        = {{S}ingle {C}rystal {D}iffraction {S}tudies with {H}ot
                      {N}eutrons on {HEIDI}/{MLZ}},
      reportid     = {FZJ-2017-08121},
      year         = {2017},
      abstract     = {The single crystal diffractometer HEiDi at the 20 MW
                      neutron source Heinz Maier-Leibnitz Zentrum (MLZ) uses hot
                      neutrons for structural studies on various hot topics
                      related to physics, chemistry and mineralogy by offering
                      high flux, high resolution and large q range, low absorption
                      and high sensitivity for light elements. High temperature
                      studies on Nd2NiO4+δand Pr2NiO4+δ brownmillerites
                      concerning their oxygen diffusion pathways reveal a double
                      well potential pointing towards the interstitial vacancy
                      sites, creating a quasicontinuous shallow energy diffusion
                      pathway between apical and interstitial oxygen sites
                      (Ceretti et al.). Future studies will use a special mirror
                      furnace which allows temperatures > 1000°C and Atmospheres
                      with various oxygen content. Various multiferroic compounds
                      from the melilite family, e.g. Ba2CoGe2O7 andCa2CoSi2O7 were
                      studied in order not only to reveal their orthorhombic
                      antiferromagnetic magnetic order structures at low
                      temperature but also the risks of misinterpretation of
                      structural data due to multiple scattering (Sazonov et al.).
                      Different studies on silicateand phosphate-based gems like
                      brazilianite, hureaulite and axinite (G.D. Gatta et al.)
                      show the broad variety of hydrogen bonds with different
                      degrees of disorder. Aside from scientific examples this
                      contribution will give an overview of the most recent
                      instrumental features (esp. pressure cell development (BMBF
                      funding 05K16PA3) and the new mirror furnace).},
      month         = {Jul},
      date          = {2017-07-09},
      organization  = {International Conference on Neutron
                       Scattering 2017, Daejeon (Republik of
                       Korea), 9 Jul 2017 - 13 Jul 2017},
      subtyp        = {After Call},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      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) / 6213 - Materials and
                      Processes for Energy and Transport Technologies (POF3-621) /
                      6212 - Quantum Condensed Matter: Magnetism,
                      Superconductivity (POF3-621)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15 /
                      G:(DE-HGF)POF3-6213 / G:(DE-HGF)POF3-6212},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/840616},
}