12)      Determine the resolution limit of diffraction.

Click on "Guess diffraction limit" in the SuperGUI window:

A small window appears telling you that the ten images are being read. The program lists what it finds in the "collect text output" window, and then displays a window something like this:

Typical small-molecule data collections using Mo K(alpha) radiation go out as far as 55° in 2theta (27.5° in theta!), which corresponds to 0.77Å resolution. If diffraction is weak you may want to cut the high-resolution angle limit to 25° in theta, which is about 0.83Å resolution. If you remember Bragg's Law you can work this all out yourself.

You get to set these parameters later, so make a mental note of whether you intend to change the maximum diffraction angle and/or scan time.

If you don't know what these numbers mean, you should not be attempting to operate the diffractometer on your own!

 

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