A simple technique for growing large, optically "perfect" ice crystals

Charles A. Knight
1996 Journal of Glaciology  
Large, single ice crystals containing nо air bubbles and free of both small-angle grain boundaries and visible stress birefringence can be grown using a very simple growth chamber within a temperature-controlled, outer enclosure. The method relies upon the spontaneous formation of an ice crystal with its с axis accurately normal to a free, slightly supercooled, water surface.
doi:10.3189/s0022143000003567 fatcat:qlhfcoa2dze7hhinaanu33przi