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He returned to London and confirmed that his most recent crystallographic data, as well as Franklin’s, clearly supported a double helix.

Accompanying the article was another, by Gosling and Franklin, providing strong crystallographic evidence for the double-helical structure.

One can speculate that the movement of polar walls17 — boundaries that form between two STO domains that have different crystallographic orientations18 — produces the spikes of current observed by Noël and co-workers.

Whereas the crystallographic restriction theorem asserted that crystals can possess only two-, three- four- or sixfold rotationally symmetry, the Bragg diffraction pattern of quasicrystals shows other symmetry orders—such as a fivefold symmetry.

Qiu et al. attributed this effect to a process referred to as domain swinging, whereby the 71° walls alternate between two crystallographic planes and tend to merge, thereby decreasing their number.