NILERED / SCIENCE PHOTO LIBRARY NILERED / SCIENCE PHOTO LIBRARY
Iodine sublimation and melting. Solid iodine being heated in a laboratory beaker, producing a purple gas and a purple liquid. Iodine at room temperature is a grey-black solid. Gentle heating below the melting point drives a solid-gas transition known as sublimation. Further heating results in the iodine melting (at 113 degrees Celsius). Iodine, found in seaweed and sea water, is an essential part of the diet.
Model release not required. Property release not required.