Tables for
Volume A
Space-group symmetry
Edited by Th. Hahn

International Tables for Crystallography (2006). Vol. A. ch. 8.1, p. 721


H. Wondratscheka*

aInstitut für Kristallographie, Universität, D-76128 Karlsruhe, Germany
Correspondence e-mail:


Representation of the point X with respect to origin O by the vector [\overrightarrow{OX} = {\bf x}]. The vector x is described with respect to the vector basis [\{{\bf a}_{1},{\bf a}_{2}\}] of [{\bf V}^{2}] by the coefficients [x_{1},x_{2}]. The coordinate system [(O,{\bf a}_{1},{\bf a}_{2})] of the point space [E^{2}] consists of the point O of [E^{2}] and the vector basis [\{{\bf a}_{1},{\bf a}_{2}\}] of [{\bf V}^{2}].