Hmm... A chiral snowflake would be impossible in roughly homogeneous, isotropic growth conditions, but in a different ambient field, maybe it would be possible! One idea is to connect the base of an e-needle to a slow moving electric motor, and have e-needle + hexagonal plate rotate during formation. Or install fans to give a chiral velocity field for water vapor. Either technique seems likely to produce chiral symmetry breaking in formed crystals. Another possibility is to grow the snow crystal around the center of a circular magnetic field. However, I'm not sure if the Lorentz force law would cancel out anisotropy on average? Are there filaments of low enough resistance to generate a B-field without getting too hot to prevent dendrite growth? --Brad On Mon, Dec 30, 2019 at 6:38 AM Joerg Arndt <arndt@jjj.de> wrote:
All the following files are in https://jjj.de/tmp-math-fun/ 3464-degenerate-curve-B-const-star-hr.pdf BIG pdf image, size = 5 MB, so use a decent viewer.