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(一)概述镓,原子量69.72,在1875年用光谱法初次发现的。镓在地壳中的含量为1.5×10~(-3)%,它不生成单独矿物存在,自然界中的镓主要都存在于周期系中相邻元素的矿物中。镓与铝同族,两者的化学性质略似,离子半径也相差无几,因此,含铝矿物中,一般都含有镓,又由于 GaS 的晶形与 ZnS 一样,因此 Pb—Zn矿中也合有少量的镓。含镓量丰富的是锗石 Cu_3GeO_4
(A) Overview Gallium, atomic weight 69.72, first discovered by spectroscopy in 1875. The content of gallium in the crust is 1.5 × 10 ~ (-3)%, it does not produce a single mineral, gallium in nature are mainly found in the minerals of adjacent elements in the periodic system. Gallium and aluminum congeners, both the chemical properties of a little similar, the ionic radius is also almost the same, therefore, aluminum-containing minerals, generally contain gallium, but also because of GaS crystal form and ZnS, Pb-Zn mine also combined with a small amount Gallium. Gallium content is rich germanium stone Cu_3GeO_4