van der Net A, Drenckhan W, Weaire D and Hutzler S ‘The Crystal Structure of Bubbles in the Wet Foam Limit (Amendment)’ in Soft Matter, 2, 2006, p. 523
Soft Matter 2
We have observed a rich variety of three-dimensional crystal
and defect structures spontaneously formed by small (diameter
200 mm) bubbles in a wet foam. The observations confirm and
extend those made by Bragg and Nye in 1947. However, while
their experiments with two-dimensional bubble rafts have
stimulated many researchers, their work on three-dimensional
wet assemblages does not appear to have been followed up.
These ordered packings now pose intriguing questions for the
physics of foams. The bubbles seem too large for conventional
thermodynamics and kinetics to easily explain the high degree
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