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Britannica Sources used in this answer

What colour is solid iodine at room temperature?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
A labeled diagram highlights the periodic table entry for iodine, atomic number 53, symbol I, atomic weight 126.90447, and electron configuration. It shows iodine as a solid halogen with an orthorhombic crystal structure and strongly acidic higher-valence oxides, using color and shape keys for classification.
iodine

At room temperature, iodine is a nonmetallic, nearly black solid with a glittering crystalline appearance.1