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Alloying lead and tin with antimony improves the properties of the alloys which are used in solders, bullets and plain bearings.Antimony compounds are prominent additives for chlorine- and bromine-containing fire retardants found in many commercial and domestic products.As expected by periodic trends, it is more electronegative than tin or bismuth, and less electronegative than tellurium or arsenic.
Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead.
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Therefore, pure antimony is not used to make hard objects: coins made of antimony were issued in China's Guizhou province in 1931, but because of their rapid wear, their minting was discontinued. Four allotropes of antimony are known, a stable metallic form and three metastable forms, explosive, black and yellow.
Metallic antimony is a brittle, silver-white shiny metal.