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Definition of germanium

A grayish-white, metallic element occurring in argyrodite, a sulfide of germanium and silver; and in germanite, zinc ores, and coal. Its presence in coal ensures a large reserve of the element in the future. Symbol, Ge. It is a very important semiconductor material. Also used as an alloying agent, a phosphor, a catalyst, and for infrared detectors and optical equipment.

Ref: Handbook of Chemistry and Physics, 3


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