The X-ray diffraction(XRD) results in the baked slag prove that Li and Al are transformed into Li2SO4 and Al2(SO4)3 soon after decomposition by sulfuric acid. The one noticed section is SiO2 from the XRD designs of leach residue, indicating that Li, Al and P are all transformed into soluble substances https://lepidolitechakra70235.mybloglicious.com/40624555/not-known-details-about-where-is-lepidolite-mined