"An investigation of the weight ratio of hafnium to zirconium in ores from widely separated regions of the world was undertaken to extend knowledge on this ratio obtained by modern means and to compare with the results of previous investigators. This type of information is of interest in geochemical considerations and the value of some similar information in the literature has been vitiated by the relatively recent finding that past methods of analysis are not satisfactory. The specific radioactivity of the original ores was determined in an attempt to check the proposition originated by Hevesy and apparently generally held by geochemists that the radioactivity of an ore is a measure of its hafnium content.
Knowledge of the hafnium to zirconium ratio and its variation in ores is important in that it may make possible the development of a theoretical basis for the location of ores having a high hafnium content. It appears that a thorough knowledge of the hafnium to zirconium ratio distribution throughout the world could contribute to astrochemical theories on the formation of the earth because zirconium and hafnium are probably the least likely pair of elements to be separated by natural processes after their initial introduction into the earth"--Introduction, pages 3-4.
Cooley, Robert A.
Chemical and Biochemical Engineering
M.S. in Chemical Engineering
Missouri School of Mines and Metallurgy
v, 65 pages
© 1951 Arliss Virgil Martin, All rights reserved.
Thesis - Open Access
Radioactivity -- Measurement
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Martin, Arliss V., "The specific radioactivity and ratio of hafnium to zirconium in ores from different continents and the preliminary design of a process for producing hafnium" (1951). Masters Theses. 3043.