Abstract
A new method, involving the use of a Weissenberg goniometer, is described for finding the orientation of a crystal of known cell size and shape, when it is orientated arbitrarily on the goniometer head. A single photograph in the equi-inclination setting is taken and interpreted in terms of the positions of reflecting reciprocal points. A graphical method of finding the orientation of the crystallographic axes from the directions of the normals to the indexed lattice planes is given. This is illustrated by a practical example. Also the analytical procedure which can be employed in conjunction with a computer is described.
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