Liquid Xenon Rapid Phase Change: this small sealed vial contains pure xenon gas at very high pressure- 65 atmospheres! When cooled to 16C (61F) the xenon gas undergoes a rapid phase change to liquid as seen here when the ampule is put in contact with the tip of an icicle. The video is shown in real time and the liquid xenon returns to gas within a minute or so and the process can be repeated indefinitely. The vial is made of fused quartz and kept small (3cm long) to be able to contain the high p