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Figure 2
Analysis of observed Bragg reflections projected in reciprocal space onto a direction later determined to be the a axis of the sample's orthorhombic unit cell. Panel (a) shows the histogram f(j) of reflections projected onto this axis, while panel (c) gives its power spectrum. The peak at l = 18 corresponds to a lattice periodicity along this axis of 36.4 Å. The single Fourier coefficient F(18) can be used [equation (5)[link]] to create an approximate model for f(j), shown in panel (b). Note that the projection of the true beam position onto the axis, indicated by an asterisk (*), corresponds exactly to a crest in this model. Panels (a) and (c) correspond to Figs. 1 and 2 of Steller et al. (1997BB26).

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