Abstract
THE investigation of a very great number of ores containing zirconium has revealed the presence of hafnium without exception. (Comp. the December issue of the Journ. Chem. Soc., 1923.) The hafnium content, which could be readily estimated by quantitative X-ray spectroscopy as devised by Coster (Chem. News, 127. 65, 1923), was found to vary greatly for different ores as described in detail in the paper referred to. For the larger number of ores investigated, the hafnium content varied between 2 and 6 per cent. For certain zirconium ores the hafnium content, however, was only 1 per cent, or less, while for a few very rare ores, referred to below, hafnium is present in even larger amount than zirconium.
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HEVESY, G. The Hafnium Content of some Historical Zirconium Preparations. Nature 113, 384–385 (1924). https://doi.org/10.1038/113384a0
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DOI: https://doi.org/10.1038/113384a0
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