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@ARTICLE{Wiethoff:398355,
      author       = {Wiethoff, Felix and Grevel, Klaus-Dieter and Marler, Bernd
                      and Petrikis, Julia and Majzlan, Juraj and Kirste, Jens and
                      Lathe, Christian},
      title        = {{P}-{V}-{T} behavior of {F}e{O}({OH}) and {M}n{O}({OH})},
      journal      = {Physics and chemistry of minerals},
      volume       = {44},
      number       = {8},
      issn         = {1432-2021},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {PUBDB-2017-13930},
      pages        = {567 - 576},
      year         = {2017},
      note         = {© Springer-Verlag Berlin Heidelberg ; Post referee
                      fulltext in progress; Embargo 12 months from publication},
      abstract     = {The P-V-T behavior of FeO(OH) and MnO(OH) has been
                      determined under high pressure and high temperature up to
                      7.5 GPa and 500 °C using a MAX 80 cubic anvil
                      high-pressure apparatus. The samples, synthetic goethite,
                      α-FeO(OH), respectively, a natural groutite/manganite,
                      α-MnO(OH)/γ-MnO(OH), specimen were mixed with Vaseline to
                      ensure hydrostatic pressure-transmitting conditions, and
                      NaCl served as an internal standard for pressure
                      calibration. Energy-dispersive diffraction patterns were
                      collected at a fixed 2θ angle (θ ≈ 4.52°). At
                      pressures >7.1 GPa and temperatures >310 °C,
                      respectively, P > 6.3 GPa and T > 350 °C, the
                      transformation goethite ↔ ε-FeO(OH) was observed. Between
                      400 and 450 °C, the sample dehydrated to magnetite due to
                      the reducing conditions caused by the graphite-tube furnace.
                      By fitting a Birch–Murnaghan equation of state to the
                      data, the bulk modulus of goethite was determined as
                      (112.26 ± 2.26) GPa, (K′ = 4), V$_{T,0}$ =
                      (138.79 ± 0.10) Å$^3$·exp
                      [∫(0.497 ± 0.103) × 10$^{−4}$ dT],
                      (∂KT/∂T)P = (–0.033 ± 0.020) GPa K$^{−1}$. For
                      ε-FeO(OH), the values K = (142.8 ± 15.1) GPa, V0 =
                      (66.18 ± 0.16) Å$^3$, (K′ = 4), were obtained.
                      Groutite and manganite are more compressible than their Fe
                      analogues. K(groutite) = (84.0 ± 2.9) GPa, V$_0$ =
                      (139.92 ± 0.13) Å$^3$, (K′ = 4). K(manganite) =
                      (82.2 ± 3.0) GPa, V$_0$ = (135.37 ± 0.15) Å$^3$,
                      (K′ = 4). Groutite disappeared at P ≈ 5.5 GPa and
                      T = 300 °C, only manganite remained. At
                      T > 400 °C, the sample dehydrated first to
                      Mn$_3$O$_4$ [II] and then to manganosite (MnO) again
                      pointing to reducing conditions.},
      cin          = {DOOR},
      ddc          = {550},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {899 - ohne Topic (POF3-899) / FS-Proposal: I-20110903
                      (I-20110903)},
      pid          = {G:(DE-HGF)POF3-899 / G:(DE-H253)I-20110903},
      experiment   = {EXP:(DE-H253)D-F2.1-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000422366600005},
      doi          = {10.1007/s00269-017-0884-3},
      url          = {https://bib-pubdb1.desy.de/record/398355},
}