"point group" in crystallography is characterized by a set of symmetry operations such that all points in a crystal are affected by it no point in a crystal is

"Point Group" in crystallography is characterized by a set of symmetry operations such that all points in a crystal are affected by it no point in a crystal is affected by it at least one point in a crystal is affected by it at least one point in a crystal is unaffected by it What are the Miller indices of a plane that intercepts each of the crystallographic axes X, Y and Z, at 20 A? (Assume a primitive unit-cell with the dimensions a = 5 A,b =2Å and c = 4 A.) (111) (524) (425) (542)