 | Acta Crystallographica Section D Acta Crystallographica Section D BIOLOGICAL CRYSTALLOGRAPHY |
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![[Figure 1]](ba5191fig1mag.jpg)
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Figure 1
The Ewald sphere construction. The crystal is located at the centre of the Ewald sphere (O), the X-ray beam is along the X axis and the origin of the reciprocal lattice (Q) is at the point where the X-ray beam exits the Ewald sphere. The laboratory coordinate frame is defined by the orthogonal set of axes denoted X, Y, Z and the spindle axis is parallel to Z. A set of six reciprocal-lattice points lying in a plane parallel to the YZ plane are shown as lying on the surface of the Ewald sphere, giving rise to a set of diffracted beams (dotted lines) that result in a set of spots that lie on a circle on the planar detector. Xd, Yd define the detector coordinate frame. The scattering vector for one of the reciprocal-lattice points is shown as a bold line. |
![[Figure 1]](ba5191fig1.jpg)
| BIOLOGICAL CRYSTALLOGRAPHY |
ISSN: 1399-0047
