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. 1.1, p. 2

Section 1.1.2. Directions and planes

Th. Hahna*

a Institut für Kristallographie, Rheinisch-Westfälische Technische Hochschule, Aachen, Germany
Correspondence e-mail: hahn@xtal.rwth-aachen.de

1.1.2. Directions and planes

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Printed symbol Explanation
[uvw] Indices of a lattice direction (zone axis)
uvw Indices of a set of all symmetrically equivalent lattice directions
(hkl) Indices of a crystal face, or of a single net plane (Miller indices)
(hkil) Indices of a crystal face, or of a single net plane, for the hexagonal axes a1, a2, a3, c (Bravais–Miller indices)
{ hkl } Indices of a set of all symmetrically equivalent crystal faces (`crystal form'), or net planes
{ hkil } Indices of a set of all symmetrically equivalent crystal faces (`crystal form'), or net planes, for the hexagonal axes a1, a2, a3, c
hkl Indices of the Bragg reflection (Laue indices) from the set of parallel equidistant net planes (hkl)
d hkl Interplanar distance, or spacing, of neighbouring net planes (hkl)








































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