In nature, tin is seldom free, so there are few pure metallic tin. The most important tin ore is cassiterite, chemical composition of two tin oxide. This copper smelting tin, iron, aluminum is easy, as long as the cassiterite together with burning charcoal, charcoal will be put out in cassiterite tin reduction. Obviously, the ancient people tin place if there is fire burning when grilled wild animals, the earth would be charcoal reduction of cassiterite, tin silver and melted will flow out. Because of this, tin was discovered long ago.
Tin is well developed at room temperature. Especially in the 100 degrees, show it is very good, can develop into a very thin foil. Usually, people with foil packaging cigarettes, candy, to prevent damp (in recent years, China has gradually replaced with aluminum foil. It is easy to distinguish the aluminum foil and foil - tin foil light more than). However, the ductility of tin is very poor, it can not be pulled into filaments when it is pulled.
Tin is the famous "hardware" - one of gold, silver, copper, iron and tin. As early as in ancient times, people discovered and used tin. A number of ancient tombs in China, they often find some tin pot, like tin tin candlestick. According to research, China's Zhou Dynasty, the use of tin has been very common. In the ancient tombs of Egypt, tin articles were also found.
