In the zinc blende structure, zinc ions occupy alternate tetrahedral voids and `S^(2-)` ions exist as ccp the radii of `Zn^(2+)` and `S^(2-)` ions are
In the zinc blende structure, zinc ions occupy alternate tetrahedral voids and `S^(2-)` ions exist as ccp the radii of `Zn^(2+)` and `S^(2-)` ions are 0.83Å and 1.74 Å respectively.The edge length of the ZnS unit cell is :
A. 2.57 Å
B. 5.14 Å
C. 2.96 Å
D. 5.94 Å
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Correct Answer - D
`r_+/(r_(-))` gt0.414 `implies a=4/sqrt3(r_+ +r_-)=4/sqrt3(0.83+1.74)=5.935 Å ~~ 5.94 Å`
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