Figure 5
Geometry of the [theta] scan in the reciprocal space. (a) Section of the Ewald sphere with reciprocal-lattice point H2 of the secondary reflection lying at the latitude level 3 and at level 1. (b), (c) and (d) Enlarged parts of the Ewald sphere showing the path of the RLP H2 during the [theta] scan. The circles in (b), (c) and (d) are replaced with tangents.  [article HTML]