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The properties of the caesium-antimony alloy, first described by Görlich, have been investigated. It was found that this alloy has the stoichiometric formula SbCs 3 , has the electric reistance of a semi-conductor and emits under favourable conditions about 1 photo-electron for 5 incident light-quanta at 4600 A. Alloys of similar structure were also investigated, and the effect of superficial oxidation was studied.
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Alfred Sommer (1943) studied this question.
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