New terms: X-ray crystallography children

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As of now, there's only one, catch-all, term: MI:0114 - X-ray crystallography with description suggesting it applies to only one particular technique - single crystal diffraction whereas, in practice there's more. Thus making clear MI:0114 refers to any X-ray diffraction technique and adding a few more specific terms seems to be in place. The specific term could be:

powder diffraction - analysis of a diffraction pattern generated by an isotropic sample composed of many randomly oriented crystals.

fiber diffraction - analysis of diffraction pattern of a partially ordered sample composed of fibers oriented parallel to each other.

single crystal diffraction - analysis of a diffraction pattern generated by a single crystal

Finally, there's also x-ray scattering technique (SAXS) where the internal structure of a sample is derived from the intensity distribution of the scattered monochromatic X-ray beam at very low scattering angles. It should most likely be a term separate from X-ray diffraction (ie direct descendant of MI:0013 - biophysical)

Reported by: lukasz99

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I agree a good reference would help

Luisa

Original comment by: luisa_montecchi

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what about (assuming ISBNs can be used as references):

International Tables for Crystallography, Vol F, Kluver Academic Publ 2001, ISBN: 0-7923-6857-6 ?

and/or

Cantor CR, Schimmel PR; Biophysical Chemistry. Part II Techniques for the study of biological structure and function.

Freeman & Co. ISBN: 0-7167-1189-3

lukasz

Original comment by: lukasz99

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X-ray tomography is also a technique for detecting the interactions between molecules. This is also a child term. of xray crystallography

Original comment by: jyotikhadake

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X-ray tomography as CAT scan ? if that's the case I'd say it belongs somewhere within imaging techniques... placing it inside a crystallography term doesnt seem to fortunate as there are no crystals involved...

lukasz

Original comment by: lukasz99

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Approved at the PSI Washington meeting and added as MI:0824 to MI:0827

Original comment by: luisa_montecchi

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• status: open --> closed

Original comment by: luisa_montecchi