Electron crystallography: imaging and single-crystal diffraction from powders

Zou, X.D.; Hovmöller, S.

doi:10.1107/S0108767307060084

Figure 7
Electron diffraction patterns from (a) the [lambda]

and (b) the [tau]

(

) approximants taken at 100 kV along the c axis, on the same scale and with similar orientation. The corresponding strongest diffraction spots in the two approximants are marked by arrow heads. The diffraction pattern of [lambda]

in (a) shows only p6 symmetry while that of [tau]

(

) in (b) shows p6m symmetry. Note however that the strongest diffraction spots in [lambda]

(a) have approximate p6m symmetry. From Zhang, He et al. (2006