稀有金属是个宝稀有金属是自然界中含量较少、分布较散、提炼较难、应用较晚的金属的总称。除常用金属如铁、铜、铅、锌、金、银等外,其它金属多算做稀有金属,已知的有四十多种。稀有金属过去应用较少,只是在第二次世界大战中,特别是在战后工业发达国家科学技术革命中才渐渐广泛应用。例如,直到四十年代,人们才开始应用铀;一九五七年铍开始应用于工业;六十年代原子工业才采用钶和铋。这些被埋没多年的稀有金属正在军事和工业 Rare metal is a treasure Rare metal is less in nature, more scattered distribution, more difficult to extract, the late application of the general term of the metal. In addition to the commonly used metals such as iron, copper, lead, zinc, gold, silver, etc., other metals are considered rare metals, known to have more than 40 kinds. Rare metals were used less in the past, only gradually gained wide application in the Second World War, especially in the scientific and technological revolution in post-war industrialized countries. For example, uranium was not used until the 1940s; beryllium began to be used in industry in 1957; gallium and bismuth were used by the atomic industry in the 1960s. These rare metals, buried for years, are in military and industrial