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Study of ammonium uranates by X-ray diffraction and diffuse reflectance infrared spectrometry

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Abstract

Ammonium uranates (AU) obtained by the addition of aqueous NH4 OH to a solution of UO2 (NO3)2 or the equilibrium reaction of UO3 · 2H2 O with the vapour over concentrated NH4 OH have been studied by X-ray diffraction (XRD) analysis, diffuse reflectance Fourier transform infrared spectrometry (DR-FTIR) and chemical analysis. Ammonia can be present as either NH3 or NH +4 . For precipitates obtained at a pH of 3.7, ammonia in the form of NH3 is predominant. For ammonium uranate obtained by reaction over concentrated NH4OH, most of the ammonia is bonded as NH +4 . The reaction mechanism and structures of the products are also discussed.

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Authors and Affiliations

  1. Institute of Nuclear Energy Research, Nuclear Analytical Chemistry Center, 32500, Lung-Tan, Taiwan, (Republic of China)

    Chen-Yeh Lin & Yu-Chai Yeh

  2. Department of Chemistry, University of California, 92521, Riverside, CA, (USA)

    P. R. Griffiths

Authors
  1. Chen-Yeh Lin
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  2. Yu-Chai Yeh
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  3. P. R. Griffiths
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Lin, CY., Yeh, YC. & Griffiths, P.R. Study of ammonium uranates by X-ray diffraction and diffuse reflectance infrared spectrometry. Journal of Radioanalytical and Nuclear Chemistry, Articles 131, 131–137 (1989). https://doi.org/10.1007/BF02046617

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  • DOI: https://doi.org/10.1007/BF02046617

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