: Adjectis synonymis et veteribus et recentioribus ac novissimarum analysium chemicarum summis. Systematis mineralium naturalis prodromus. OCLC 995480390. ^ a bMining was unmechanized and labor-intense, with pickmen liberating the ore in the rock, and mine-boys or carusi carrying baskets of ore towards the surface area, generally via a mile or e… Read More

For use in electronic devices, germanium ingots or billets need further purification, which normally is effected through the technique of zone refining. The highly pure germanium is then melted and “doped” by the addition of minute amounts of arsenic, gallium, or other factors to create preferred electronic characteristics. Last but not least, … Read More