Very large purity silicon for semiconductors is acquired using the Siemens course of action; the silicon is reacted to produce trichlorosilane, which is very first purified by distillation, then reacted with purified hydrogen on large purity silicon rods at 1150 oC to produce large purity, polycrystalline silicon with hydrochloric acid https://borosilicate-glass-lined58036.onesmablog.com/rumored-buzz-on-chromium-carbide-overlay-77376926