1. Reciprocal Lattice & Diffraction
Crystallography
H. K. D. H. Bhadeshia
Reciprocal Lattice & Diffraction

13. Weiss Zone Rule proven!

15. Cubic P, section of reciprocal lattice normal to [001]

17. Cubic P, section of reciprocal lattice normal to [110]

19. Cubic P, section of reciprocal lattice normal to [111]

21. For 100 keV accelerating voltage, the wavelength of electrons is 0
For 100 keV accelerating voltage, the wavelength of electrons is nm.
If the d spacing is 0.2 nm, then the Bragg angle is just 0.5°
Ewald sphere has a large diameter in reciprocal space.

24. Cubic P
Cubic F

25. Cubic P
Cubic F

26. Cubic P
Cubic F

28. Lattice: face-centred cubic Motif: Si at 0,0,0 Si at 1/4,1/4,1/4
3/4
1/4
3/4
1/4
3/4
1/4
3/4
1/4
Lattice: face-centred cubic
Motif: Si at 0,0,0 Si at 1/4,1/4,1/4

33. diffraction from thin crystals

35. 100 nm thick foil
20 nm thick foil

36. [111]
[ ]

37. (R. Herring)