What is a body centered cubic?

What is the percentage efficiency of packing in case of simple cubic lattice and body centred cubic lattice ?

The atomic radius of a body centred cubic cell is:

What is Barr body?

What is the coordination number of atoms (a) in a cubic close packed structure? (b) in a body centred cubic structure?

Define face centred cubic and body centred cubic unit cell.

Tungsten crystallises in body centred cubic crystal. If the edge of the unit cell is 316.5 pm, what is the radius of tungsten atom?