Leonhardt chart

Any particular orientation of the plane, such as the one shown in the drawing, is characterized by particular values of (f) and <5, the angular coordinates of its pole. These coordinates in turn, for a given crystal-film distance D (= CO), determine the x,y coordinates of the diffraction spot R on the film. From the spot position we can therefore determine the plane orientation, and one way of doing this is by means of the Leonhardt chart [2.3] shown in Fig. 8-14. 

Fig. 8-14 Leonhardt chart for the solution of transmission Laue patterns, reproduced in the correct size for a specimen-to-film distance of 3 cm. The dashed lines are lines of constant 0, and the solid lines are lines of constant 3. (Courtesy of C. G. Dunn [8.3].)...

Fig. 8-15 Use of the Leonhardt chart to plot the pole of a plane on a stereographic projection. Pole 1 in (b) is the pole of the plane causing diffraction spot 1 in (a).

Fig. 8-16 Use of the Leonhardt chart to plot the axis of a zone of planes on the projection. is the axis of zone...

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