Abstract
A CONNEXION has already been noted between the rare earth content of fluorites, their colour and their fluorescence when viewed under ultra-violet light1. Europium has been indicated as probably responsible for the blue component of the observed fluorescence, and ytterbium for the green component.
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References
Dunham, K. C., Fluorspar, Mem. Geol. Surv. Gt. Brit., fourth ed. (1952).
Malan, H. P., and Münzel, H., Radiochim. Acta, 5, 20 (1966).
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JEFFERY, P. Rare Earth Content of Green Fluorite—a New Source of Europium. Nature 215, 496–497 (1967). https://doi.org/10.1038/215496a0
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DOI: https://doi.org/10.1038/215496a0
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