反应条件
in melt byproducts: SiO2; melting of lepidolite, fine powdering, slurrying, addn. of concd. HCl, pptn. of SiO2 on vaporization with HCl, filtration from SiO2, addn. of HNO3 to oxidate Fe, filtration, pptn. of impurities with Na2CO3, filtration, pptn. of Li with Na2CO3;;
