antimony an·ti·mo·ny (ān'tə-mō'nē)
An element having several allotropes, the most common of which is a brittle, silver-white crystalline metal. It is used in alloys and in flame-proofing compounds. Atomic number 51; atomic weight 121.76; melting point 630.6°C; boiling point 1,587°C; specific gravity 6.691; valence 3, 5.
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