Difference between revisions of "Unit cell"
From Online Dictionary of Crystallography
(→See also) |
m (→Unit cell) |
||
| Line 3: | Line 3: | ||
=== 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="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