Difference between revisions of "Twin law"
From Online Dictionary of Crystallography
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= Twin law = | = Twin law = | ||
| − | The ''twin law'' expresses the operation that generate a twin. It is indicated by the symbol of the twinning element of symmetry: <math> \bar 1</math>, [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. | + | The ''twin law'' expresses the operation that generate a ''[[twin]]''. It is indicated by the symbol of the twinning element of symmetry: <math> \bar 1</math>, [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''<br> | Chapter 3.3 of ''International Tables of Crystallography, Volume D''<br> | ||
[[Category:Fundamental crystallography]] | [[Category:Fundamental crystallography]] | ||
Revision as of 09:43, 26 April 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: [math] \bar 1[/math], [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