New answers tagged experimental-technique
Some brief answers, and references for further reading below. 1) You are right to be concerned about your sample having crystals with a preferred orientation. A single crystal would produce points instead of circles. The points would fall somewhere on the circles. But the image you provided shows that it is possible for the point to be off the film. ...
You can use diffraction of low energy electrons (to study the crystalline surface) or X-ray crystallography (you can get the surface orientation from that also).
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