International
Tables for
Crystallography
Volume B
Reciprocal space
Edited by U. Shmueli

International Tables for Crystallography (2006). Vol. B. ch. 2.5, p. 286   | 1 | 2 |

Table 2.5.3.1 

P. Goodmanb

Table 2.5.3.1| top | pdf |
Listing of the symmetry elements relating to CBED patterns under the classifications of `vertical' (I), `horizontal' (II) and combined or roto-inversionary axes

I. Vertical symmetry elements
International symbols
[\eqalign{&2, 3, 4, 6 \quad (2_{1}, 3_{1}, \ldots)\cr &m \;\phantom{2, 3, 4, 6} (c)\cr &a, b \!\!\phantom{2, 3, 4, 6} (n)}]
II. Horizontal symmetry elements
  Diperiodic symbols BESR symbols
2′ m
[2'_{1}]  
m [1_{R}]
a′, b′, n  
[\bar{1}'] [2_{R}]
[\hbox{I} + \hbox{II}] [\bar{4}'] [4_{R}]
[\hbox{I} \times \hbox{II}] [\bar{3}' = 3 \times \bar{1}'] [6_{R} = 3 \cdot 2_{R}]
  [\bar{6}' = 3 \times m'] [31_{R}]