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Zinc oxide is an inorganic compound with the formula Zn O.Zn O is a white powder that is insoluble in water, and it is widely used as an additive in numerous materials and products including rubbers, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, and first-aid tapes.Although it occurs naturally as the mineral zincite, most zinc oxide is produced synthetically.This semiconductor has several favorable properties, including good transparency, high electron mobility, wide bandgap, and strong room-temperature luminescence.

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Zn O converts to the rocksalt motif at relatively high pressures about 10 GPa.A small amount of industrial production involves wet chemical processes, which start with aqueous solutions of zinc salts, from which zinc carbonate or zinc hydroxide is precipitated.The solid precipitate is then calcined at temperatures around 800 °C.However, many of these form deep acceptors and do not produce significant p-type conduction at room temperature.In the indirect or French process, metallic zinc is melted in a graphite crucible and vaporized at temperatures above 907 °C (typically around 1000 °C).

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