Question 6: A simple orthorhombic lattice has the following…

Question 6: A simple orthorhombic lattice has the following lattice constants: a=0.30 nm; b=0.30nm; c=0.50 nm. Draw the diffraction pattern when a crystal is observed along the , and directions, respectively. Indicate the relationship between the real and the reciprocal lattice (3) (Assume that there are no forbidden reflections in this lattice)                                                         Assume that you are observing the crystal under zone axis at 100 kV. How many diffraction spots will you observe for the thickness of:  1) 100 Å 2) 150 Å                                                                                                                    (9) (Assume that we have to assume that the intensity drops to zero when the excitation error, s exceeds the first minimum)

Question 2                                                 …

Question 2                                                              (4) Atomic scattering factor of which of the following elements would be the largest? 1) Si (Z=14) 2) Fe (Z=26) 3) Pt (Z=78) 4) Sr (Z=38)