An iodine is crystalline 2801200000
Under normal conditions, iodine is a solid black-gray substance with a metallic sheen and a specific odor. The vapors have a characteristic violet color, just like solutions in non-polar organic solvents, for example, in benzene - in contrast to a brown solution in polar alcohol. Iodine at room temperature is a dark violet crystals with a low luster. When heated at atmospheric pressure, it sublimes (sublimes), turning into purple vapors; upon cooling, iodine vapors crystallize, bypassing the liquid state. This is used in practice to remove non-volatile impurities from iodine.
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