packing efficiency

Packing Fraction||Efficiency||Percentage OF void space||Coordination Number|| Description OF Cube|| Contribution OF Atom present at different location in a Cube||Class Illustrations with Short Tricks

In which pair most efficient packing is present?

The efficiency of packing in simple cubic unit cell is

The efficiency of packing in simple cubic unit cell is

Calculate the efficiency of packing in case of a metal crystal for a. Simple cubic b. Body-centred cubic c. Face-centred cubic (with the assumptions that atoms are touching each other).