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ZnO crystallizes in the same structure as ZnS (wurtzite). That means, you can conceptually build a...

ZnO crystallizes in the same structure as ZnS (wurtzite). That means, you can conceptually build a ZnO unit cell by starting with ZnS and replacing each sulfur atom with oxygen. How would you expect the dimensions of the ZnS unit cell to compare with those of the ZnO unit cell? Please provide structures if possible. Thanks.

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Consider the size of the O2- and S2- atoms. S2- is larger than O2-. If we conceptually remove the S2- and replace them with O2- in the lattice, The unit cell dimension of ZnO will be smaller than the unit cell dimension of ZnS. This can even be calculated if the density of the crystal and radii of the ions are known. the structure is a face-centered unit cell as shown below.

Face-Centered structure reality, these io ns touch each other. Hence, when replaced by 02-, th dimensions of the unit cell wi

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