铟在地壳中是不形成单一的矿床,但它很广泛的散佈于自然界中,然其量甚微:已为人类所知者在很多的铁、铅、铜特别是锌的矿床中则伴有之,均不具有单独回收的意义。在冶炼铜、铅和锌等的过程中,铟高集于它们的残渣和升华物中,为提制金属铟的主要原料。某地区近年来开采的含铜矿石,都为黄铜矿,经浮选后含铟平均为0.0013％。 Indium does not form a single deposit in the earth’s crust, but it is widely dispersed in nature, but in very small amounts: it has been known to mankind that in many deposits of iron, lead, copper, especially zinc, It does not have the meaning of separate recovery. In the process of smelting copper, lead and zinc, indium is highly concentrated in their residues and sublimes, and is the main raw material for the preparation of metallic indium. In recent years, some areas of copper ore mined, are chalcopyrite, indium after flotation containing an average of 0.0013%.