fit2d calibration

[john o callaghan]

Dear all, I've got some SAXS data that needs looking at, but i've forgotten how 
to calibrate "fit2d" to give the proper d-spacing. Any help most welcome!! 
Silver behenate was the calibrant. John O'Callaghan John O'Callaghan, Materials 
and Supercritical Fluid Section, Chemistry Dept., University College Cork, 
Ireland. 
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