Extinction rules for the group P_I4_2nm (102.194)
Extinctions for general positions (produced by centrings):
   (h k l)     ->      Extinction rule/s:    h + k + l = 2n
For h = 1, k = 1, l = 1 : I ≠ 0 F = (Fx, Fy, Fz)
For h = 1, k = 1, l = 2 : I = 0 F = (0, 0, 0)
For h = 1, k = 2, l = 1 : I = 0 F = (0, 0, 0)
For h = 1, k = 2, l = 2 : I ≠ 0 F = (Fx, Fy, Fz)
For h = 2, k = 1, l = 1 : I = 0 F = (0, 0, 0)
For h = 2, k = 1, l = 2 : I ≠ 0 F = (Fx, Fy, Fz)
For h = 2, k = 2, l = 1 : I ≠ 0 F = (Fx, Fy, Fz)
For h = 2, k = 2, l = 2 : I = 0 F = (0, 0, 0)
Extinctions for special positions:
   (0 0 l)          ->      Extinction Rule/s: l any
   (0 k l)          ->      No extra extinctions found
   (h 0 l)          ->      No extra extinctions found
   (h -h l)          ->      No extra extinctions found
   (h h l)          ->      No extra extinctions found
Go to the operators of 102.194 (PI42nm)
Go to the Wyckoff Positions of 102.194 (PI42nm)