Abstract
A CONFERENCE on the "Conduction of Electricity in Solids" was held at Bristol on July 13-16 under the joint auspices of the Physical Society and the University of Bristol. The discussions were opened by R. W. Pohl, who gave an account of the fundamental work on electron conductivity and photochemical processes in' alkali-halide crystals carried out in his laboratory at Göttingen. The paper was mainly concerned with the properties of crystals which have been coloured either by heating in alkali vapour or in other ways, introducing colour centres called 'f-centres'. A discussion followed on the exact nature of these F-centres, and, although there is as yet no certainty on this point, a hypothesis was proposed which seemed to have a good deal to recommend it, namely that an F-centre is an electron localized at a point in the lattice where a negative ion is missing.
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Conduction of Electricity in Solids Conference at Bristol. Nature 140, 204–205 (1937). https://doi.org/10.1038/140204a0
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DOI: https://doi.org/10.1038/140204a0