Diffraction by Crystal with Finite Size (in Kinematical Approximation) & [ - Ex Pcrystal(r)e-iQ.rdr =222 r ) Punit cell(r - (ua + vb + rc))e-iQr dr NC = G(Q)F(0) Na ND NC u=1 v=1 r=1 +6+ Na No NC Np No G(Q) = 2 *exp(-iQ. (ua + vb+re)) Question: I G(Q12 |F(Q12 Prove that |GQ12 is given by Laue function. u=1 v=1 r=1 Atomic scattering factor Laue function (Naqia sin? (N.Q.:6) sin? (N-2-9) 2 |G(Q)2 = sin? (@z ^) sin? ( ) sin(934) sin? ? ? 2 2 2 a 2 FQ) = Punit cell(r)e-ikrdr = Punit cell 2 2