Difference between revisions of "Reflection twin"
From Online Dictionary of Crystallography
m |
BrianMcMahon (talk | contribs) (Edits to align with printed edition) |
||
| Line 1: | Line 1: | ||
| − | <Font color="blue"> Macle par reflexion </Font>(''Fr''). <Font color="black"> Geminato per riflessione </Font>(''It''). | + | <Font color="blue">Macle par reflexion </Font>(''Fr''). <Font color="black">Geminato per riflessione </Font>(''It''). |
Two domains of one crystal form a ''reflection [[twin]]'' when the [[twin operation]] is a reflection across a lattice plane (''twin plane''). | Two domains of one crystal form a ''reflection [[twin]]'' when the [[twin operation]] is a reflection across a lattice plane (''twin plane''). | ||
| + | |||
| + | 1. Rational twin mirror plane normal to an irrational line. This lattice plane is common to both twin partners. | ||
| + | |||
| + | 2. Irrational twin mirror plane normal to a rational lattice row. This lattice row [''uvw''] is common to both twin partners. | ||
[[Category:Twinning]] | [[Category:Twinning]] | ||
Revision as of 16:25, 16 May 2017
Macle par reflexion (Fr). Geminato per riflessione (It).
Two domains of one crystal form a reflection twin when the twin operation is a reflection across a lattice plane (twin plane).
1. Rational twin mirror plane normal to an irrational line. This lattice plane is common to both twin partners.
2. Irrational twin mirror plane normal to a rational lattice row. This lattice row [uvw] is common to both twin partners.