fig15

Figure 15. (A) disrupted muscovite structure; (B) fragments are micron-sized active structures; (C) Impurity diffusion diagram during high-temperature roasting and acid leaching^[5]; (D) Reaction configuration of impurity iron with sulfate ions in quartz crystals (101)^[94]; (E) Lattice substitution within quartz crystals to form impurity aluminum; (F) Atomic configuration of SO₂ reacting with trivalent iron.