Page "X-ray crystallography" Paragraph 36

Other forms of elastic X-ray scattering include powder diffraction, SAXS and several types of X-ray fiber diffraction, which was used by Rosalind Franklin in determining the double-helix structure of DNA.

In general, single-crystal X-ray diffraction offers more structural information than these other techniques ; however, it requires a sufficiently large and regular crystal, which is not always available.