If three element, P , Q and R crystallize in a cubic solid lattice with P atoms at he corners, Q atoms at the cube centre and R atoms of the faces of the cube, then write the formula of the compound.

If three element, P , Q and R crystallize in a cubic solid lattice wit

1.	If three element, P , Q and R crystallize in a cubic solid lattice with P atoms at he corners, Q atoms at the cube centre and R atoms of the faces of the cube, then write the formula of the compound.
Answer» SOLUTION :Atoms P PER formula CELL =` 8 xx 1//8 =1 ` , Atoms Q per unit cell =1 , Atoms R per UNITCELL =1 , Atoms R per unit cell = ` 6 xx 1//2 =3` Hence the formula is ` PQR_(3)`