Several important aspects of the Miller indices for planes should be noted Planes and their negatives are identical. Therefore(020)=(020) e Planes and their multiples are not identical 3 In cubic systems, a direction that has the same indices as a plane is perpendicular to that planeSeveral important aspects of the Miller indices for planes should be noted:  Planes and their negatives are identical. Therefore .  Planes and their multiples are not identical.  In cubic systems, a direction that has the same indices as a plane is perpendicular to that plane. (020) = (020)