1. An orthorhombic crystal with lattice parameters a = 0.32 nm, b= 0.27 nm and c= 0.5 nm is irradiated with a 200kV beam of electrons. a) Determine the Bragg angles (in mrad) for the (110), (001) and (100) Miller planes. b) Determine the magnitudes of the change in wavevector K. (6) (4) c) Determine the magnitude and direction (relative to real space lattice) for the reciprocal lattice vectors a*, b* and c*. (6)

1. An orthorhombic crystal with lattice parameters a = 0.32 nm, b= 0.27 nm and c= 0.5 nm is irradiated with a 200kV beam of electrons. a) Determine the Bragg angles (in mrad) for the (110), (001) and (100) Miller planes. b) Determine the magnitudes of the change in wavevector K. (6) (4) c) Determine the magnitude and direction (relative to real space lattice) for the reciprocal lattice vectors a, b and c*. (6)