9 Methods for finding values of parameters.
Crystal model has to be varied as much as necessary to test as many models as applicable.
Crystal thickness to estimate this parameter use inclined defect of known habit plane, thickness fringes in area of known crystal structure. Compare experimental micrograph with calculated HREM maps. Crystal tilt align crystal on zone axis as carefully as possible. Otherwise use values of related structure. Microscope align the microscope carefully in order to get zero astigmatism and zero beam tilt, use a TV camera system with on-line FFT capability.