Wurtzite
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Wurtzite is a less frequently encountered mineral form of zinc sulfide, named after French chemist Charles-Adolphe Wurtz.
The crystal structure is a member of the hexagonal crystal system and consists of tetrahedrally coordinated zinc and sulfur atoms that are stacked in an ABABAB pattern. The structure is closely related to the structure of lonsdaleite, or hexagonal diamond.
The unit cell parameters of wurtzite are:
Several other compounds can take the wurtzite strucutre, including AgI, ZnO, CdS, CdSe, GaN, AlN, and other semiconductors. In most of these compounds, wurtzite is not the favored form of the bulk crystal, but the structure can be favored in some nanocrystal forms of the material.
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