Chemicals and chemical materials used in industry, science and agriculture, namely, [ magnesium hydroxide, ] magnesium oxide [, magnesium carbonate, calcium hydroxide, calcium oxide, calcium carbonate, zirconium oxide, calcium sulfite, calcium peroxide, silicon carbide, silicon nitride; chemicals used in deposition, namely, chemical source material for the deposition of thin films; magnesium oxide ceramics in particle and compacted form used as target material for sputtering, electron-beam d...