Question

How many tetrahedral holes are occupied in diamond??
25%,50%,75%,100%
plz do explain..

Answer 1

diamond has a ZnS type structure. the carbon atoms occupy all the fcc lattice points along with alternative tetrahedral voids .
total no.of tetrahedral voids in fcc unit cell =8
Where carbon atom occupy only 4 of them . therfore percentage of tetrahedral voids occupied by carbn atom in diamond is 50 percent