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This and other lattice symmetry properties result in piezoelectricity of the hexagonal and zincblende Zn O, and pyroelectricity of hexagonal Zn O.

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).

Zinc vapor reacts with the oxygen in the air to give Zn O, accompanied by a drop in its temperature and bright luminescence.

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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.

Zn O decomposes into zinc vapor and oxygen at around 1975 °C with a standard oxygen pressure.

In a carbothermic reaction, heating with carbon converts the oxide into zinc vapor at a much lower temperature (around 950 °C). The wurtzite structure is most stable at ambient conditions and thus most common.

The zincblende form can be stabilized by growing Zn O on substrates with cubic lattice structure.

In both cases, the zinc and oxide centers are tetrahedral, the most characteristic geometry for Zn(II).

Zinc oxide particles are transported into a cooling duct and collected in a bag house.