zeroth-order Laue zone (ZOLZ) reflection

"Laue zones" are defined as the reciprocal lattice planes perpendicular to the direction of the incident beam. A Laue zone containing the point of origin (reciprocal lattice point corresponding to the incidence point) is called the "zeroth-order Laue zone (ZOLZ)." The ZOLZ reflections appear around the transmitted beam in a CBED pattern, which have symmetry characteristic of a specimen crystal and show loose angular change. The ZOLZ reflections give two-dimensional information on a crystal projected along the direction of the incident beam.

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