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@ARTICLE{Grzechnik:111852,
      author       = {Grzechnik, A. and Friese, K.},
      title        = {{C}rystal structures and stability of {N}a{L}n{F}4 ({L}n =
                      {L}a, {C}e, {P}r, {N}d, {S}m and {G}d) studied with
                      synchrotron single-crystal and powder diffraction},
      journal      = {Dalton transactions},
      volume       = {41},
      issn         = {1477-9226},
      address      = {London},
      publisher    = {Soc.},
      reportid     = {PreJuSER-111852},
      pages        = {10258 - 10266},
      year         = {2012},
      note         = {Record converted from VDB: 16.11.2012},
      abstract     = {Crystal structures of the NaLnF(4) materials (Ln = La, Ce,
                      Pr, Nd, Sm or Gd) were studied with synchrotron
                      single-crystal and powder diffraction. The materials with Ln
                      = La, Ce, Nd, Sm and Gd have the average β structure (P6, Z
                      = 1) with partial ordering of the cations. A new type of a
                      superstructure due to ordering of the cations and vacancies
                      was found in NaPrF(4) (P3, Z = 6). It could be described
                      using the group-subgroup relationships P6↔P3. Our
                      observations suggest that the β structure is unstable and
                      that the ordering is a slow process at ambient conditions.
                      Upon compression, β-NaNdF(4), β-NaGdF(4) and the
                      superstructure NaPrF(4) are stable to at least 8 GPa with no
                      evidence for any pressure-induced disorder-order phenomena.},
      cin          = {PGI-4 / JCNS-2 / JARA-FIT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-4-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {Grundlagen für zukünftige Informationstechnologien
                      (FUEK412) / 544 - In-house Research with PNI (POF2-544)},
      pid          = {G:(DE-Juel1)FUEK412 / G:(DE-HGF)POF2-544},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22797523},
      UT           = {WOS:000307306400020},
      doi          = {10.1039/c2dt30650f},
      url          = {https://juser.fz-juelich.de/record/111852},
}