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 depositi...