Saved Bookmarks
| 1. |
Caleulate the packing efficiency in a unit cell of Cubic Close Packing(CCP) structure. |
|
Answer» Solution :For ccp structure `a = (4r)/(sqrt(2)) = 2 sqrt(2) r or r = (a)/(2 sqrt(2))` Packing efficiency = `("VOLUME occupied by four spheres in the unit CELL" XX 100 %)/("Total volume of the unit cell")` `= (4 xx (4)/(3) pi r^(3) xx 100)/((2 sqrt(2) r)^(3))%` `= ((16)/(3) pi r^(3) xx 100)/(16 sqrt(2) r^(3))%` = 74% |
|