International
Tables for Crystallography Volume A Space-group symmetry Edited by Th. Hahn © International Union of Crystallography 2006 |
International Tables for Crystallography (2006). Vol. A, ch. 1.4, p. 8
Section 1.4.3. Symmetry planes inclined to the plane of projection (in cubic space groups of classes and only)^{a}Institut für Kristallographie, Rheinisch-Westfälische Technische Hochschule, Aachen, Germany |
1.4.3. Symmetry planes inclined to the plane of projection (in cubic space groups of classes and only)
^{†}The symbols represent orthographic projections. In the cubic space-group diagrams, complete orthographic projections of the symmetry elements around high-symmetry points, such as ; ; , are given as `inserts'.
^{‡}For further explanations of the `double' glide plane e see Note (iv) below and Note (x) in Section 1.3.2 . ^{§}In the space groups (216), (225) and (227), the shortest lattice translation vectors in the glide directions are or and or , respectively. ^{¶}The glide vector is half of a centring vector, i.e. one quarter of the diagonal of the conventional body-centred cell in space groups (220) and (230). ^{††}Glide planes d occur only in orthorhombic F space groups, in tetragonal I space groups, and in cubic I and F space groups. They always occur in pairs with alternating glide vectors, for instance and . The second power of a glide reflection d is a centring vector. |