Abstract
The occurrence of significant traces of beryllium in fluorite would appear to be unlikely on crystallographic grounds, yet Sainsbury has reported as much as 0.01 per cent Be in the mineral from the Lost River area, Alaska. In the present paper a spectrochemical method and a radiochemical isotope dilution procedure for the determination of beryllium in fluorite are described. These techniques have been used to analyze some sixty specimens of fluorite from arbitrarily selected localities. The results indicate little tendency for beryllium to concentrate in fluorite, although samples from areas particularly rich in beryllium were not examined. A study of the coprecipitation of beryllium with calcium fluoride shows that the carrying of the trace element up to a level of ~900 ppm resembles isomorphous replacement. This observation is discussed.
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