Difference between revisions of "Crystal pattern"
From Online Dictionary of Crystallography
m (→See also: internal link) |
(Better after the language list) |
||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
| − | < | + | <font color="blue">Motif cristallin</font> (''Fr''). <font color="red">Unendlicher Idealkristall</font> (''Ge''). <font color="black">Motivo cristallino</font>(''It''). <font color="purple">結晶模様</font> (''Ja''). <font color="green">Cristal ideal infinito</font> (''Sp''). |
| − | + | '''Synonym''': ''infinite ideal crystal'' | |
| − | |||
| − | |||
| − | When the crystal pattern consists of atoms, it takes the name of '''crystal structure'''. The crystal pattern is thus the generalization of a crystal structure to any pattern, concrete | + | |
| + | An object in the ''n''-dimensional [[point space]] ''E<sup>n</sup>'' is called an ''n''-dimensional '''crystallographic pattern''' or, for short, '''crystal pattern''' if among its symmetry operations: | ||
| + | # there are ''n'' translations, the translation vectors '''t'''<sub>1</sub>, ... , '''t'''<sub>''n''</sub> of which are linearly independent; | ||
| + | # all translation vectors, except the zero vector '''0''', have a length of at least ''d'' > 0. | ||
| + | |||
| + | When the crystal pattern consists of atoms, it takes the name of '''[[crystal structure]]'''. The crystal pattern is thus the generalization of a crystal structure to any pattern, concrete or abstract, in any dimension, which obeys the conditions of periodicity and discreteness expressed above. | ||
== See also == | == See also == | ||
*[[Point space]] | *[[Point space]] | ||
*[[Noncrystallographic symmetry]] | *[[Noncrystallographic symmetry]] | ||
| − | *''International Tables | + | *''International Tables for Crystallography, Volumes A'' and ''A1'' |
[[Category:Fundamental crystallography]] | [[Category:Fundamental crystallography]] | ||
Latest revision as of 15:33, 16 November 2018
Motif cristallin (Fr). Unendlicher Idealkristall (Ge). Motivo cristallino(It). 結晶模様 (Ja). Cristal ideal infinito (Sp).
Synonym: infinite ideal crystal
An object in the n-dimensional point space En is called an n-dimensional crystallographic pattern or, for short, crystal pattern if among its symmetry operations:
- there are n translations, the translation vectors t1, ... , tn of which are linearly independent;
- all translation vectors, except the zero vector 0, have a length of at least d > 0.
When the crystal pattern consists of atoms, it takes the name of crystal structure. The crystal pattern is thus the generalization of a crystal structure to any pattern, concrete or abstract, in any dimension, which obeys the conditions of periodicity and discreteness expressed above.
See also
- Point space
- Noncrystallographic symmetry
- International Tables for Crystallography, Volumes A and A1