Indexing of Diffraction Patterns (Ring Pattern & Spot Pattern)

1. Reciprocal lattice vector (a*) is:
2. Which equivalence hold true:
3. The camera length of the instrument is constant.
Note: Camera Length needs to be calculated using a standard (say gold sample) whose lattice parameter is known.
4. What is the zone axis for the following diffraction pattern?
5. What is the zone axis for the following diffraction pattern?
6. What is the zone axis for the following diffraction pattern?