Difference between revisions of "Rotation twin"
From Online Dictionary of Crystallography
m |
BrianMcMahon (talk | contribs) m (Edits to align with printed edition) |
||
| Line 1: | Line 1: | ||
| − | <Font color="blue"> Macle par rotation </Font> (''Fr''). <Font color="black"> Geminato per rotazione </Font>(''It''). <Font color="purple"> 回転双晶 </Font>(''Ja'') | + | <Font color="blue"> Macle par rotation </Font> (''Fr''). <Font color="black"> Geminato per rotazione </Font>(''It''). <Font color="purple"> 回転双晶 </Font>(''Ja''). |
==Definition== | ==Definition== | ||
Two domains of one crystal form a ''rotation [[twin]]'' when the [[twin operation]] is a rotation about a lattice row (''twin axis''). | 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 == | ==See also == | ||
| − | Chapter 3.3 of ''International Tables | + | * Chapter 3.3 of ''International Tables for Crystallography, Volume D'' |
[[Category:Twinning]] | [[Category:Twinning]] | ||
Revision as of 16:40, 16 May 2017
Macle par rotation (Fr). Geminato per rotazione (It). 回転双晶 (Ja).
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