Wyckoff positions

From Wikipedia, the free encyclopedia

You have new messages (last change).

The introduction to this article provides insufficient context for those unfamiliar with the subject matter.
Please help improve the introduction to meet Wikipedia's layout standards. You can discuss the issue on the talk page.

A Wyckoff position is a term arising from the mathematical concept of group theory.

It refers to points, X, for which site symmetry groups, S(X) are conjugate subgroups of the space group, G. Refer to Bilbao Crystallographic Server or other crystallography tables to find the Wyckoff positions for different space groups.

These positions aid in determining basis sets for crystals. There are two types of positions, general and special.

[edit] General Positions

General positions are left invariant only for the identity operation. Each space group has only one general position.

[edit] Special positions

Special positions are left invariant by the identity operation and at least one other operation of the space group.

[edit] External link

Retrieved from "http://en.wikipedia.org../../../w/y/c/Wyckoff_positions.html"