Magnetic diffraction Systematic Absences for the group Am'm'2 (#38.191) For this space group, BNS and OG settings coincide. Its label in the OG setting is given as: Am'm'2 (#38.5.269)
Values of h, k, l:  h integer, k integer, l integer
Systematic absences for general reflections (produced by centrings):
Diffraction vector type: (h k l) -> Systematic absence: k + l = 2n + 1
Systematic absences for special reflections:
Diffraction vector type: (0 0 l) -> Systematic absence: l any