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    The behavior of thallium with respect to potassium and rubidium in coexisting micas and feldspars

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    Author
    Riber, Joshua Isaac
    Date
    1966
    Advisor
    Adams, John A. S.
    Degree
    Master of Arts
    Abstract
    Seventeen muscovites, eleven biotites, eleven microclines, one albite, and one lepidolite from five granite and granite pegmatite localities were analyzed for thallium, rubidium, and potassium by atomic absorption spectrophotometry. Rubidium and potassium were determined in aqueous solutions. Thallium was determined in butanol in which 0.1 gamma/ml T1 was easily detected. Mean Rb/Tl ratios range from 110 for pegmatitic biotites to 232 for granitic microclines. No significant difference in Rb/Tl ratios between granites and pegmatites was noted, while there is a tendency for T1 to be enriched, with respect to K and Rb, progressively in microcline, muscovite, biotite. Rubidium is similarly enriched with respect to K. Thallium content varied from 1 ppm in a microcline sample to 108 ppm in the lepidolite. Maximum value for microcline is 70 ppm, 54 ppm for muscovite and 37 ppm for biotite. Thallium appears to follow Kb more closely than K in granites and pegmatites. There is little variation in mean Kb/Tl ratios.
    Citation
    Riber, Joshua Isaac. "The behavior of thallium with respect to potassium and rubidium in coexisting micas and feldspars." (1966) Master’s Thesis, Rice University. http://hdl.handle.net/1911/90077.
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892