Extinction directions identification

Figure 15 Symmetry identification of iow-temperature charge-ordered Lao.ssCao.eeMnOs. (a) the experimentai CBED pattern from a singie crystai domain in Lao.ssCao.ByMnOs recorded at 99K and aiong the [010] zone axis, (b) schematic illustration of charge ordering models, (c) the line extinction across a series of odd-indexed reflections along the reciprocal 2 direction in the experimental pattern, (d) and (e) Simulated CBED patterns from the CO structures described by the Wigner-crystal and Bi-stripe models (b) for the thickness of 300 nm...

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