Physical Properties of Antimony
Antimony is a lustrous gray and brittle metal, which is used to hard other metals such as lead and tin. Because it melts at over 1100 F, it is an ideal way to harden lead, which makes the lead more durable. Below are some of the physical and chemical properties of Antimony.
- Atomic Number: 51
- Symbol: Sb
- Appearance: Solid lustrous gray brittle metal or as a dark grey powder.
- State at room temperature: Solid or Powder
- Density: 6.697 g/cm3
- Melting Point: 630.63 Celsius (1167.63 F)Â
- Hardness: Mohs scale hardness of 3.0Â
- Conductivity: Poor Thermal and Electrical Conductivity
- Expansion: Expands on cooling, like water
- Allotropes: Three allotropes, yellow crystalline, amorphous black and explosive.
Antimony Applications
Typically, the largest applications for antimony are alloys with lead and tin. Below are some examples.
- Lead with antimony plates in lead-acid batteries.
- Alloys of lead and tin improve properties for solder, bullets, and plain bearings.
- Antimony compounds are prominent additives for chlorine and bromine-containing fire retardants.
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