
Figure 4
A schematic showing the measurement method by sample rotation. The sample rotates around the axis, usually by 360°, while the axis is fixed. When the unit step width of rotation is 0.2°, then one frame of the image data contains all the reciprocal points in that step width, = 0.2°. The detector range in diffraction angle 2_{B} is 110° and so a twostep measurement is needed to cover a full diffraction range up to 160°. 