Principal reflection

Profound line profile analysis is possible if a set of reflections is observed, i.e., peaks from several crystallographic orders indexed by (h) are accessible. With respect to a principal reflection found at the position, V(, the positions of the higher orders are... 

Direct NO scattering from Ag(lll) is perhaps the most extensively experimentally studied molecule-surface scattering system. This principally reflects the ease... 

The relative positions of the molecules in the unit cell were afterwards found by calculating some of the structure amplitudes for various positions. The arrangement in one sheet of molecules is shown in Fig. 191. (In the published account (Cox and Goodwin, 1936) use is made of the conception of a pseudo plane "of symmetry perpendicular to the plane of the molecule and perpendicular to the c axis actually the apparent halving of a in the c projection does not demand any such pseudo plane of symmetry in the molecule, but can be produced with completely asymmetric molecules, as Fig. 190 shows. However, as it turns out, the configuration and arrangement of the molecules which accounts for the intensities of the principal reflections does show a pseudo plane of symmetry in the position mentioned.)... 

The diffuse scattering from oriented polymers exhibits dependence upon the equatorial scattering angle that principally reflects the orientation of the microvoids. Formally, these may be treated in terms of direction dependent correlation functions as discussed in Section 3.3.2. 

The solution for wavelength near the principal reflection peak is... 

Results are presented in Figures 1 and 2. The precursor A shows principally reflections similar to e VOPO4.2H2O phase but with some distortions. Precursor A1 gives an exact fit with the pure VOPO4.2H2O (Figure 1). 

An increase in intensity of the principal equatorial maximum may be due to the higher crystallinity of the system. Corresponding assessments demonstrate that, in the temperature range extending fix>m 20 to 200° C, the content of crystalline phase almost does not vary and amounts to 5-10%. This means that such an integral characteristic as the area under the principal reflection remains approximately the same the growth of intensity is compensated by a decrease in the half-width of the line (Figure 16). 

Since 1997 four editions of the book have been published and this has enabled updates to be made. These updates principally reflect changes in the British dragonfly fauna, but the opportunity has also been taken to make a few minor corrections. 

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