锗是分散元素,在地壳中平均含量为7×10~(-4)%。独立的锗矿床很少,而大部分是与其它矿物共生。尽管煤中锗的品位很低,但由于煤的贮藏量和开采量都很大,因此近年来许多产锗国家除从锗精矿提取锗外,还投入很大力量研究从煤中提取。而且随着从煤中提取锗的技术的不断提高,煤已成为锗的重要来源。 Germanium is a disperse element with an average content of 7 × 10 -4% in the crust. There are few isolated germanium deposits, most of which are intergrowth with other minerals. Despite the low grade of germanium in coal, due to the large amount of coal stored and extracted, many countries that produce germanium in recent years have devoted a great deal of effort to studying the extraction of germanium from germanium concentrates. And as the technology to extract germanium from coal continues to increase, coal has become an important source of germanium.