how can u find that it contain two sets of spots? i only index as the [11-20] zone axis of hexagonal GaN.
amywinehouse 发表:In addition to the shapes of diffraction spot which indicate there are some slightly misoriented grains within the sample, such a diffraction in fact contains two sets of spots from two GaN phases, zinc-blende (<110> zone) and wurtzite ([11-20] zone).