International
Tables for
Crystallography
Volume A
Space-group symmetry
Edited by M. I. Aroyo

International Tables for Crystallography (2016). Vol. A, ch. 3.1, p. 699

Table 3.1.1.1 

H. Burzlaffa and H. Zimmermannb

Table 3.1.1.1| top | pdf |
Lattice point-group symmetries

(a) Two dimensions.

Lattice point group22mm4mm6mm
Crystal family m o t h
monoclinic (oblique) orthorhombic (rectangular) tetragonal (square) hexagonal

(b) Three dimensions.

Lattice point group[C_{i} \equiv \bar{1}][C_{2h} \equiv 2/m][D_{2h} \equiv mmm][D_{4h} \equiv 4/mmm][D_{3d} \equiv \bar{3}m][D_{6h} \equiv 6/mmm][O_{h} \equiv m\bar{3}m]
Crystal family a m o t h c
anorthic (triclinic) monoclinic orthorhombic tetragonal hexagonal cubic
The symbols for crystal families were adopted by the International Union of Crystallography in 1985; cf. de Wolff et al. (1985[link]).