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Wyckoff positions

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In crystallography, a Wyckoff position is a point belonging to a set of points for which site symmetry groups are conjugate subgroups of the space group.[1] Crystallography tables give the Wyckoff positions for different space groups.

Wyckoff positions are used in calculations of crystal properties. There are two types of positions: general and special.

  • General positions are left invariant only for the identity operation (E). Each space group has only one general position.
  • Special positions are left invariant by the identity operation and at least one other operation of the space group.

References

  1. ^ Lev. Kantorovich (2004). Quantum Theory of the Solid State: An Introduction. Springer. p. 28.


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