They were pale green with silver rings that seemed to liquefy and swirl as Xander watched.
When heated they liquefy; and if the heating be continued, the water of crystallization is driven off, the salt froths and^swells, and at last an amorphous powder remains.
"Dry distillation" is the term used when solid substances which do not liquefy on heating are operated upon; "sublimation" is the term used when a solid distils without the intervention of a liquid phase.
Faraday was first able to liquefy ammonia.
Again the solid will liquefy and once more become solid as Fe2C16.5H20.