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Difference between revisions of "Mesh"

From Online Dictionary of Crystallography

 
(Added German and Spanish translations (U. Mueller))
 
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In a two-dimensional pattern possessing rotational symmetry, the [[Symmetry element|rotation points]] constitute the nodes of a net and divide the plane into regions that are called '''meshes'''. The number of meshes meeting at any rotation point equals twice the order of the rotation at that point.
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<font color="red">Masche</font> (''Ge''). <font color="green">Trama</font> (''Sp'').
  
''N.B.'' The term '''mesh''' is sometimes ''improperly'' used to indicate a two-dimensional cell.  
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The term '''mesh''' is commonly used with two meanings:
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*In a two-dimensional pattern possessing rotational symmetry, the [[Symmetry element|rotation points]] constitute the nodes of a net and divide the plane into regions that are called ''meshes''. The number of meshes meeting at any rotation point equals twice the order of the rotation at that point.
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*A two-dimensional unit cell is also sometimes called a ''mesh''.
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According to Loeb (1971), only the first use would be correct.
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== Reference ==
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*Loeb, A. B. (1971). ''Color and symmetry.'' New York: Wiley-Interscience.
  
 
[[Category:Fundamental crystallography]]
 
[[Category:Fundamental crystallography]]

Latest revision as of 12:51, 16 November 2017

Masche (Ge). Trama (Sp).


The term mesh is commonly used with two meanings:

  • In a two-dimensional pattern possessing rotational symmetry, the rotation points constitute the nodes of a net and divide the plane into regions that are called meshes. The number of meshes meeting at any rotation point equals twice the order of the rotation at that point.
  • A two-dimensional unit cell is also sometimes called a mesh.

According to Loeb (1971), only the first use would be correct.

Reference

  • Loeb, A. B. (1971). Color and symmetry. New York: Wiley-Interscience.