Question

If a close-packed structure contains n particles, what would be the number of tetrahedral voids in the structure?

Answer 1

In a close-packed structure (such as hcp or ccp), the number of voids formed is directly related to the number of particles present. The number of tetrahedral voids is equal to 2n. So, if the structure contains n particles, the number of tetrahedral voids will be 2n.