HW03 - EMSE 312 FALL 2011 DIFFRACTION PRINCIPLES Homework...

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EMSE 312 FALL 2011 KPDL: 11-07-11 DIFFRACTION PRINCIPLES Homework Assignment #3 Due: Monday November 21, 2011 1. (10p) (a) Describe the shape of the atomic scattering factor as a function of scattering angle, and explain the reasons for its variation in magnitude. (b) List (in increasing order) the magnitude of the atomic scattering factor for the following elements during forward scattering (i.e., at a scattering angle of θ = 0 o ): Si, Te, Mo, Ti, Cl, U, Ce, Fe, O, and K 2. (10p) Cullity and Stock Problem 4-2 3. (20p) Cullity and Stock Problem 4-3 4. (10p) Cullity and Stock Problem 4-7 5. (10p) Cullity and Stock Problem 5-3 6. (20p) An unknown compound sample was investigated using XRD. The following peaks were identified using Cu(K α ) radiation ( λ 0.15405 nm). Peak # 2 θ I/I 0 1 30.5 100 2 35.2 25 3 50.6 50 4 60.3 20 5 63.2 5 6 74.7 5 7 82.6 5 8 85.5 1 9 95.8 1 (a) Index the pattern [ i.e ., determine the planes ( hkl ) that give rise to the different peaks]. In the process
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