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Pure ZnO is a white powder, but in nature it occurs as the rare mineral zincite, which usually contains manganese and other impurities that confer a yellow to red color.

Crystalline zinc oxide is thermochromic, changing from white to yellow when heated in air and reverting to white on cooling

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Description

It is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants,.
Although it occurs naturally as the mineral zincite, most zinc oxide is produced syntheticall.
Other favorable properties include good transparency, high electron mobility, wide band gap, and strong room-temperature luminescence. Those properties are valuable in emerging applications for: transparent electrodes in liquid crystal displays, energy-saving or heat-protecting windows, and electronics as thin-film transistors and light-emitting diodes.

Synonyms: Zinc white, calamine, philosopher’s wool, Chinese white, flowers of zinc

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