51 Sb Antimony
Metalloid, mass: 121.76 u, 2 stable isotopes (121, 123), abundance rank (earth/space): 61/62Click image to magnify. Ultrapure metallic antimony piece, front and back side. Original size in cm: 2 x 2
Antimony is a metalloid (or semi metal), which is rather metal than nonmetal. Here its stable metallic modification is shown. In its nonmetallic form it is yellow, but unstable. Antimony is important for semiconductors, but has been used for a long time as additive in alloys like bronze and in cosmetics. Nonetheless it is quite toxic and has effects similar to arsenic, but weaker.

Antimony crystal, 2 grams, 1 cm.
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Page last changed on February 06. 2010
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