Systematic Absences of the magnetic space group PC2 (#3.6) in the setting (a-b, a b, 2c; 0, 0, 0) of the parent space group P4/mmm (No. 123)
Values of h, k, l:  h integer, k integer, l integer
Warning: h, k, l are referred to the parent-like setting
Systematic absences for general reflections (produced by centrings):
Diffraction vector type: (h k l) -> Systematic absence: h + k = 2n
Systematic absences for special reflections:
Diffraction vector type: (h 0 0) -> Systematic absence: h any
For h = 1 : I = 0 F = (Fx,0,0)
[Show form of structure factor for every type of reflection]