铟(In)属于稀散金属,没有单独的矿床,仅以微量伴生在锌、锡等矿石中。当这些矿石中的铟含量达到十万分之几时,就算有了工业价值。铟是1863年发现的,但直到本世纪三十年代才开始投入生产。随着电子工业、飞机、汽车、船舶制造工业、原子能及合金制造等工业的发展,对铟的需求量日 Indium (In) belongs to the scattered metal, there is no separate deposit, only trace associated with zinc, tin and other minerals. When the indium content of these ores reaches a few hundredths, even if there is industrial value. Indium was discovered in 1863 but was not put into production until the 1930s. With the electronics industry, aircraft, automobiles, shipbuilding industry, atomic energy and alloy manufacturing industries, the demand for indium day