On the Stabilization of NbV-Solutions by ZrIV and HfIV

E. Sørensen, Anne Belinda Bjerre

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    Niobium cannot be separated from zirconium or hafnium when these elements occur together in solution with common anions such as Cl- and SO4. This is ascribed to the copolymerisation of Nbv and the hydrolyzed ionic species of ZrIVv and HfIV by which the colloidal particles are masked as Zr- and Hf-compounds.

    In HCl the particles are positively charged as opposed to when they are in sulphate solution where the Zr- and Hf-sulphate complexes confer a negative charge. The two cases are considered separately.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherRisø National Laboratory
    Number of pages24
    ISBN (Print)87-550-1369-4
    Publication statusPublished - 1987
    SeriesDenmark. Forskningscenter Risoe. Risoe-R


    • Risø-R-551
    • Risø-R-551(EN)


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