Twin law

(Difference between revisions)
 Revision as of 09:43, 26 April 2006 (view source)← Older edit Revision as of 09:40, 15 May 2006 (view source)Newer edit → Line 8: Line 8: Chapter 3.3 of ''International Tables of Crystallography, Volume D''
Chapter 3.3 of ''International Tables of Crystallography, Volume D''
- [[Category:Fundamental crystallography]] + [[Category:Twinning]]

Revision as of 09:40, 15 May 2006

Loi de macle (Fr). Legge di geminazione (It)

Twin law

The twin law expresses the operation that generate a twin. It is indicated by the symbol of the twinning element of symmetry: $\bar 1$, [uvw] and (hkl) for the centre of symmetry (inversion twin), direction of the rotation axis (rotation twin) and Miller indices of the mirror plane (reflection twin), in the order. Usually, instead of the single (hkl) plane, the symbol {hkl} is used to indicate all the planes equivalent for symmetry.

Chapter 3.3 of International Tables of Crystallography, Volume D