Table of Magnetic Space Group Symbols

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Extinction rules for the group Fm'm'2 (42.222)

Extinctions for general positions (produced by centrings):

(h k l) -> Extinction rule/s: h + k = 2n + 1, h + l = 2n + 1

    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 = (0, 0, 0)

    For  h = 2, k = 1, l = 1 :      I = 0       F = (0, 0, 0)

    For  h = 2, k = 1, l = 2 :      I = 0       F = (0, 0, 0)

    For  h = 2, k = 2, l = 1 :      I = 0       F = (0, 0, 0)

    For  h = 2, k = 2, l = 2 :      I ≠ 0       F = (Fx, Fy, Fz)

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

Go to the operators of 42.222 (Fm'm'2)
Go to the Wyckoff Positions of 42.222 (Fm'm'2)

Back to the list of magnetic space groups derived from Fmm2
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