Difference between revisions of "Primitive cell"
From Online Dictionary of Crystallography
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| − | <Font color="blue"> Maille primitive </Font> (''Fr'') | + | <Font color="blue">Maille primitive</Font> (''Fr''); <Font color="green">Celda primitiva</Font> (''Sp''); <Font color="black">Cella primitiva</Font> (''It''). <Font color="purple">単純単位胞、基本単位胞</Font> (''Ja''). |
== Definition == | == Definition == | ||
Revision as of 11:25, 30 March 2016
Maille primitive (Fr); Celda primitiva (Sp); Cella primitiva (It). 単純単位胞、基本単位胞 (Ja).
Definition
A primitive cell is a unit cell built on the basis vectors of a primitive basis of the direct lattice, namely a crystallographic basis of the vector lattice L such that every lattice vector t of L may be obtained as an integral linear combination of the basis vectors, a, b, c.
It contains only one lattice point and its volume is equal to the triple scalar product (a, b, c).
Non-primitive bases are used conventionally to describe centred lattices. In that case, 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
- crystallographic basis
- direct lattice
- unit cell
- conventional cell
- Section 8.1 of International Tables of Crystallography, Volume A