Difference between revisions of "Rotation twin"
From Online Dictionary of Crystallography
BrianMcMahon (talk | contribs) (Tidied translations and added German and Spanish (U. Mueller)) |
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| − | < | + | <font color="blue">Macle par rotation</font> (''Fr''). <font color="red">Achsenzwilling, Rotationszwilling</font> (''Ge''). <font color="black">Geminato per rotazione</font> (''It''). <font color="purple">回転双晶</font> (''Ja''). <font color="green">Macla de rotación</font> (''Sp''). |
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==Definition== | ==Definition== | ||
| − | Two | + | Two domains of one crystal form a ''rotation [[twin]]'' when the [[twin operation]] is a rotation about a lattice row (''twin axis''). |
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| + | 1. Irrational twofold twin axis normal to a rational lattice plane. This lattice plane is common to both twin partners. | ||
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| + | 2. Rational twofold twin axis normal to an irrational plane. This lattice row is common to both twin partners. | ||
==See also == | ==See also == | ||
| − | Chapter 3.3 of ''International Tables | + | * Chapter 3.3 of ''International Tables for Crystallography, Volume D'' |
[[Category:Twinning]] | [[Category:Twinning]] | ||
Latest revision as of 17:04, 17 November 2017
Macle par rotation (Fr). Achsenzwilling, Rotationszwilling (Ge). Geminato per rotazione (It). 回転双晶 (Ja). Macla de rotación (Sp).
Definition
Two domains of one crystal form a rotation twin when the twin operation is a rotation about a lattice row (twin axis).
1. Irrational twofold twin axis normal to a rational lattice plane. This lattice plane is common to both twin partners.
2. Rational twofold twin axis normal to an irrational plane. This lattice row is common to both twin partners.
See also
- Chapter 3.3 of International Tables for Crystallography, Volume D