Antimony

Antimony metal is a silvery-white semi-metal with four isomers, including gray antimony, blast antimony, black antimony, and yellow antimony. Of these, gray antimony is the most common metallic antimony, with a silvery-white appearance and a purplish-blue metallic luster on the cross-section. Antimony has a Mohs hardness of 3 to 3.5 and is brittle and easy to break, so pure antimony cannot be used to make hard objects.
The density of antimony is 6.68 g/cm³, and the melting point is 630.5°C. The density of antimony is 6.68 g/cm³, and the melting point is 630.5°C. Except for gray antimony, the other three isomers have no metallic properties at all and should be called nonmetals. Antimony has the properties of flame retardant and corrosion resistant, and is widely used in the fields of chemical industry, electrical engineering and medicine. Its alloys can be made into lead characters and bearings.

The global reserves of antimony are very scarce, and the proven antimony content is only 2 million tons, so it is regarded as a non-renewable precious metal resource. Antimony as a kind of "industrial monosodium glutamate", in the alloy as an additive can adjust the metal hardness. In addition, antimony also has a very distinctive physical properties, that is, in a certain temperature range will shrink and expand, this characteristic makes antimony in the industry has a wide range of applications!