antimony(redirected from Element 51)
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Related to Element 51: Element 56, Element 52, Element 53
n. Symbol Sb
A metallic element having two allotropic forms: a hard, extremely brittle, lustrous, bluish-white, crystalline material and a gray amorphous form. It is used in a wide variety of alloys, especially with lead in battery plates, and in the manufacture of flame-proofing compounds, paint, semiconductor devices, and ceramic products. Atomic number 51; atomic weight 121.76; melting point 630.63°C; boiling point 1,587°C; specific gravity 6.68; valence 3, 5. See Periodic Table.
[Middle English antimonie, from Medieval Latin antimōnium, perhaps from Arabic al-'iṯmid : al-, the + 'iṯmid, antimony (perhaps from Greek stimmi; see stibine).]
(Elements & Compounds) a toxic metallic element that exists in two allotropic forms and occurs principally in stibnite. The stable form is a brittle silvery-white crystalline metal that is added to alloys to increase their strength and hardness and is used in semiconductors. Symbol: Sb; atomic no: 51; atomic wt: 121.757; valency: 0, –3, +3, or +5; relative density: 6.691; melting pt: 630.76°C; boiling pt: 1587°C
[C15: from Medieval Latin antimōnium, of uncertain origin]
an•ti•mo•ny(ˈæn təˌmoʊ ni)
a brittle, lustrous, white metallic element occurring in nature free or combined, used chiefly in alloys and in compounds in medicine. Symbol: Sb; at. no.: 51; at. wt.: 121.75.
[1375–1425; < Medieval Latin antimōnium,]
an`ti•mo′ni•al, adj., n.
Symbol Sb A metallic element having many forms, the most common of which is a hard, very brittle, shiny, blue-white crystal. It is used in a wide variety of alloys, especially with lead in car batteries, and in making flameproofing compounds. Atomic number 51. See Periodic Table.
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|Noun||1.||antimony - a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite|
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
stibnite - a soft grey mineral; the chief ore of antimony