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@ARTICLE{Wolff:857128,
      author       = {Wolff, Jan and Hofmann, D. and Amelung, W. and Lewandowski,
                      H. and Kaiser, K. and Bol, R.},
      title        = {{R}apid wet chemical synthesis for 33{P}-labelled
                      hydroxyapatite – {A}n approach for environmental research},
      journal      = {Applied geochemistry},
      volume       = {97},
      issn         = {0883-2927},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2018-06372},
      pages        = {181 - 186},
      year         = {2018},
      abstract     = {Apatite is the principal primary phosphorus (P) source in
                      the environment; yet there is no consensus on how it can be
                      synthesized for controlled microcosm studies, particularly
                      not in labelled form. Here, we present a methodology that
                      allows for the production of stoichiometric 33Phosphorus
                      (33P)-labelled hydroxyapatite powders produced by a simple
                      and fast wet chemical procedure, with different precursor
                      compounds and at different reaction (25, 40, 60 and
                      80 °C) and calcination (100 and 200 °C) temperatures.
                      The resulting morphological structures were analysed by
                      Raman spectroscopy, X-ray diffraction (XRD), and scanning
                      electron microscopy (SEM). The results showed that rapid
                      synthesis of hydroxyapatite is successful using 33P-labelled
                      di-ammonium hydrogen phosphate and calcium nitrate with a
                      Ca/P ratio of 1.67 in less than 30 h. Crystallinity
                      increased with increasing reaction temperatures. Solubility
                      tests confirmed a strong pH dependency for all
                      hydroxyapatites at pH values <3.7. To our knowledge this is
                      the first procedure that can rapidly synthesize radioactive
                      labelled and chemically pure hydroxyapatite of different
                      crystallinities: It can be easily modified to allow for
                      labelling with other isotopes, such as 44Ca or 18O, in order
                      to provide hydroxyapatite in reproducible manner for
                      investigating the availability and uptake of P from apatite
                      in future soil and environmental studies and beyond.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000446455900017},
      doi          = {10.1016/j.apgeochem.2018.08.010},
      url          = {https://juser.fz-juelich.de/record/857128},
}