ZnS crystal structure has two types, namely cubic ZnS and hexagonal ZnS. The chemical bond properties of these two types of ZnS are the same; both are ionic bond to covalent bond transitions with a certain directivity. Zn and S atoms have coordination numbers of 4, but the difference is that the atoms are piled up in different ways. Long-standing moist air is changed into zinc sulfate. It is usually produced by the action of hydrogen sulfide with a zinc salt solution. If Cu, Mn and Ag are added to ZnS crystal as activators, different fluorescence colours can be emitted after illumination. S atoms make the densest hexagonal packing in hexagonal ZnS crystals, and Z atoms fill half of the tetrahedral gaps to form a hexagonal lattice. The hexagonal ZnS structure comprises Al, Ga and In nitrides, copper halides, Zn, Cd, Mn sulfides and selenides. Zinc sulfide is an inorganic compound with the chemical formula ZnS. It is a white or yellowish powder. It becomes darker in light. Stable in dry air, a long time in wet air or containing water, gradual oxidation to zinc sulfate. If you are looking for high quality, high purity and cost-effective zinc sulfide, or if you require the latest price of zinc sulfide, please feel free to email contact mis-asia.