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@MISC{Oh:866415,
      author       = {Oh, In-Hwan and Sohn, Yoo Jung and Meven, Martin and Heger,
                      Gernot},
      title        = {{S}ymmetrical {H}ydrogen {B}ond in ${SO}_{4}$
                      $–{H}–{SO}_{4}$ {D}imer in ${K}_{3}{H}({SO}_{4})_{2}$ by
                      {N}eutron {D}iffraction},
      journal      = {Journal of the Physical Society of Japan},
      volume       = {88},
      number       = {12},
      issn         = {1347-4073},
      address      = {Tokyo},
      publisher    = {The Physical Society of Japan},
      reportid     = {FZJ-2019-05566},
      pages        = {124601 -},
      year         = {2019},
      abstract     = {The hydrogen bond in K3H(SO4)2 was investigated using a
                      neutron single crystal diffraction technique at room
                      temperature and 2.3 K. The title compound crystallizes in
                      the monoclinc space group A12/a1 (No. 15) and SO4 dimers are
                      linked by symmetrical hydrogen bonds. Down to 2.3 K no
                      evidence for the structural phase transition was observed,
                      although the mineral letovicite (NH4)3H(SO4)2 shows various
                      phase transitions at low temperatures owing to the proton
                      ordering process. At room temperature, the nuclear density
                      of the proton shows an elongation along two oxygen atoms
                      with a distance between these two oxygen atoms of 2.504 Å.
                      At 2.3 K, the proton density becomes more symmetrical, which
                      is unusual in the hydrogen bonded systems reported thus far.
                      The distance between two oxygen atoms is then 2.472 Å.
                      Based on an analysis of the anisotropic displacement
                      parameters, the hydrogen bond in the title compound seems to
                      be a centered hydrogen bond or an intermediate form between
                      a cigar-like shape and a disk-like shape.},
      cin          = {JCNS-FRM-II / JCNS-2 / JARA-FIT / MLZ / IEK-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / $I:(DE-82)080009_20140620$ /
                      I:(DE-588b)4597118-3 / I:(DE-Juel1)IEK-1-20101013},
      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)21},
      UT           = {WOS:000500716100010},
      doi          = {10.7566/JPSJ.88.124601},
      url          = {https://juser.fz-juelich.de/record/866415},
}