Solid StateHard

Question

Which statements is/are true about HCP and CCP lattice 

Options

A.Number of tetrahedral voids are twice of octahedral holes
B.12 tetrahedral and 6 octahedral voids are present in one HCP unit cell
C.C.N. of HCP unit cell is 12
D.If atom of tetrahedral voids displace into octahedral voids then it is Schootky defect.

Solution

These are facts.

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