inorganic elements and compounds for use in the chemical, engineering, electronics, electrical, semi-conductor, microchip and terrestrial photovoltaic industries; hyperpure silicon and silicon for use in the electrical and electronic industries; doped and undoped inorganic semi-conductor material in the form of crystals, granules and powders in sawed, lapped, polished, etched and coated form for use in electrical and electronic, semi-conductor and microchip industries