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The mysterious strategic metal, molybdenum, emerged shyly from nature

Molybdenum mainly exists in the form of mineral molybdenum (MoS2). Natural molybdenum is a soft black mineral. Although molybdenum was used in ancient times, molybdenum is similar to lead, galena and graphite. The word "molybdos" means lead in Greek. Before the end of the 18th century, both were sold in the European market under the name molybadenite. In 1779, Scheler, a famous Swedish chemist and one of the discoverers of oxygen, pointed out that lead or graphite were two completely different substances from molybadenite. He found that nitric acid did not affect graphite, but reacted with molybadenite to obtain a white powder, which was boiled with alkali solution and crystallized into a salt. In his opinion, the white powder is a metal oxide (actually molybdenum oxide); it is mixed with charcoal and heated at high temperature without metal, but after heating with sulfur to get the original molybadenite. In 1782, Schelerundefineds friend, Swedish mine owner Elmo, seared in a sealed burning mixture of charcoal and molybdic acid mixed with flaxseed oil, separated the metal from molybadenite and named it the Mo. element. China translated it into molybdenum. It has been recognized by famous Swedish chemist Bezius, who has discovered elements such as cerium, selenium, silicon, tantalum and thorium. Molybdenum metal burns in the air and gives off golden light, and molybdenum ions in different oxidized states have different colors. It was not until more than 100 years after molybdenum was discovered in 1893 that M. It was only in an electric furnace that Mosson smelted the mixture of carbon and molybdenum trioxide and obtained 96% molybdenum containing 92% molybdenum for the first time.