Difference between revisions of "Twin law"
From Online Dictionary of Crystallography
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| − | The ''twin law'' is indicated by the symbol of the twinning element of symmetry: <math> \bar 1</math>, [uvw] and (''hkl'') for the centre of symmetry, direction of the rotation axis and [[Miller indices]] of the mirror plane, in the order. Usually, instead of the single (''hkl'') plane, the symbol | + | 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, direction of the rotation axis and [[Miller indices]] of the mirror plane, in the order. Usually, instead of the single (''hkl'') plane, the symbol {''hkl''} is used to indicate all the planes equivalent for symmetry. |
Revision as of 14:49, 21 April 2006
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, direction of the rotation axis and Miller indices of the mirror plane, in the order. Usually, instead of the single (hkl) plane, the symbol {hkl} is used to indicate all the planes equivalent for symmetry.