![]() ![]() Therefore the ratio between cationic and anionic radii in zinc blend is 0.39 (74pm/190 pm). The ionic radius for Zn 2+ is 74pm and for S 2- is 190pm. Since the number of atoms in a single unit cell of Zn and S is the same, it is consistent with the formula ZnS. It is characterized by single bonds between each atom and maintenance of a 1:1 zinc to sulfur ratio. Wurtzite has a hexagonal structure, while zincblende is cubic. These two polymorphs are wurtzite and zincblende (also known as sphalerite). Zinc sulfide (ZnS) is a unique compound that forms two types of crystalline structures. ![]() It maintains a tetrahedral arrangement in both forms. These are characterized by a 1:1 stoichiometric ratio of Zinc to Sulfur. Summary: Zinc blend is a compound that comes in two forms: sphalerite and wurtzite. Structure-wise, the zinc blende structure is more thermodynamically favored, however, because of the wurtzite structures slow construction, both forms of ZnS can be found. ZnS can have a zinc blende structure which is a "diamond-type network" and at a different temperature, ZnS can become the wurtzite structure type which has a hexagonal type symmetry. ZnS has a unique structure type compared to other molecules, having different types of unique structures. Calculating density of a crystal structure. ![]()
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