Show that the number of octahedral voids in a ccp or an hcp structure is equal to the number of packed particles.

Show that if the radius of octahedral holes be r in a ccp or hcp structure be r and that of packed particles be R, then r=0.414xxR .

Show that if the radius of tetrahedral holes in a ccp or a hcp structure be r and that of packed particles be R, r=0.225xxR .

the number of octahedral voids per unit cell in NaCl crystal is ………… .

Number of tetrahedral voids in a face-centred cubic unit cell is-

What do you understand by an octahedral void in a close-packed crystal structure? What is the relation between the number of octahedral voids and the number of packed particles in a close-packed structure of particles?

The number of octahedral void(s) per atom present in a cubic close-packed structure is-

What is the maximum number of atoms in a hcp crystal structure of an element ?

Assertion:A tetrahedral void is surrounded by four spheres and an octahedral void is surrounded by six spheres. Reason:The number of tetrahedral voids is double the number of close packed spheres and number of octahedral voids is equal to number of close packed spheres.

What do you understand by a tetrahedral void in a close-packed structure of a crystal? What is the relation between the number of tetrahedral voids and the number of packed particles in a close-packed structure of particles?