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Difference between revisions of "Unit cell"

From Online Dictionary of Crystallography

(See also)
m (Unit cell)
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=== Other languages ===
 
=== Other languages ===
  
<Font color="blue>Maille élémentaire </Font>(''Fr''). <Font color="red"> Einheitszelle </Font>(''Ge''). <Font color="green">Celda unidad </Font>(''Sp''). <FONT color="purple">элементарная ячейка </Font>(''Ru'').<Font color="black"> Cella elementare </Font>(''It'')
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<Font color="blue>Maille élémentaire </Font>(''Fr''). <Font color="red"> Einheitszelle </Font>(''Ge'');. <Font color="green">Celda unidad </Font>(''Sp''); <FONT color="purple">элементарная ячейка </Font>(''Ru''); <Font color="black"> Cella elementare </Font>(''It''); <Font color="purple">単位胞(単位格子)</Font> (''Ja'').
  
 
= Definition =
 
= Definition =

Revision as of 11:18, 26 February 2007

Unit cell

Other languages

Maille élémentaire (Fr). Einheitszelle (Ge);. Celda unidad (Sp); элементарная ячейка (Ru); Cella elementare (It); 単位胞(単位格子) (Ja).

Definition

The unit cell is the parallelepiped built on the vectors, a, b, c, of a crystallographic basis of the direct lattice. Its volume is given by the triple scalar product, V = (a, b, c).

If the basis is primitive, the unit cell is called the primitive cell. It contains only one lattice point. If the basis is non-primitive, the unit cell is a multiple cell and it contains more than one lattice point. The multiplicity of the cell is given by the ratio of its volume to the volume of a primitive cell.


See also

conventional cell
direct lattice

Section 8.1 of International Tables of Crystallography, Volume A