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|Section2= |Section7= |Section8= }} Calcium cyanamide is the inorganic compound with the formula CaCN2. This calcium derivative of cyanamide (CN22-) is used as fertilizer, first synthesized in 1898 by Adolph Frank and Nikodem Caro (Frank-Caro process).〔(【引用サイトリンク】title=History of Degussa: Rich harvest, healthy environment )〕 It is commercially known as nitrolime. ==Production== Calcium cyanamide is prepared from calcium carbide. The carbide powder is heated at about 1,000°C in an electric furnace into which nitrogen is passed for several hours. The product is cooled to ambient temperatures and any unreacted carbide is leached out cautiously with water. :CaC2 + N2 → CaCN2 + C (ΔHƒ°= –69.0 kcal/mol at 25 °C) The reaction is conducted in large steel chambers. An electric carbon element heats the reactants to red heat. Nitrogen gas is pressurised at 2 atmospheres. It crystallizes in hexagonal crystal system with space group ''R3m'' and lattice constants ''a'' = 3.67, ''c'' = 14.85 (.10−1 nm).〔F. Brezina, J. Mollin, R. Pastorek, Z. Sindelar. ''Chemicke tabulky anorganickych sloucenin'' (''Chemical tables of inorganic compounds''). SNTL, 1986.〕〔Vannerberg, N.G. "The crystal structure of calcium cyanamide" Acta Chemica Scandinavica (1-27,1973-42,1988) (1962) 16, p2263-p2266〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「calcium cyanamide」の詳細全文を読む スポンサード リンク
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