Abstract
THREE new types of pleochroic haloes have been found by Prof. G. H. Henderson in the course of an extended examination of biotite specimens. Apparently these are due to certain elements of the uranium family, and are of hydrothermal origin.
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Points from Foregoing Letters. Nature 140, 200 (1937). https://doi.org/10.1038/140200a0
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DOI: https://doi.org/10.1038/140200a0