Bragg "diffraction" or "reflection" As you read about X-ray (or neutron) diffraction in solids, you come across authors who use the term "Bragg diffraction" and others that use the term "Bragg reflection". Some authors even use both terms in the same edition of the book (Kittel, 5th Ed.,, I think..). My question is: Isn't there a difference b/w the two terms? Or better yet, why are they used equivalently? Some discussion with colleagues suggested that reflection occurs in the reciprocal lattice, and diffraction occurs in the real lattice. Is this the case?