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The physical and chemical properties of zinc sulfide

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Overviews of Zinc sulfide
Zinc sulfide is an inorganic compound with a chemical formula of ZnS and an appearance of white to off-white or light yellow powder. See the light darken.
It is stable in dry air, and when it is placed in humid air for a long time or contains moisture, it will gradually oxidize to zinc sulfate. Soluble in dilute inorganic acid, soluble in alkali, insoluble in water. The relative density is 3.98 (α type), (d25) 4.102 (β type). It is irritating.
Physical properties of Zinc sulfide
White or slightly yellow powder. It turns into crystals when burning in H2S gas. The alpha variant is a colorless hexagonal crystal with a density of 3.98g/cm3 and a melting point of 1700±28°C (202.66 kPa-20 atmospheres); the beta variant is a colorless cubic crystal with a density of 4.102g/cm3, which is converted to at 1020°C α type. Exist in sphalerite.
Chemical properties of Zinc sulfide
Insoluble in water, soluble in acid. See the sunlight dimmed. It is converted into zinc sulfate in humid air for a long time. It is generally derived from the action of hydrogen sulfide and zinc salt solution. If a small amount of Cu, Mn, Ag is added as an activator in the crystalline ZnS, it can emit different colors of fluorescence after being illuminated. Used as analytical reagents, coatings, paints, white and opaque glass, filling rubber, plastics, and for preparing phosphors. It is made by co-heating sulfur and zinc. The relative density is 4.087.
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