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|Section2= |Section3= }} Calcium arsenate is the inorganic compound with the formula Ca3(AsO4)2. A colourless solid, it was originally used as a pesticide and as a germicide. It is highly soluble in water, as compared with lead arsenate, which makes it more toxic. The minerals Rauenthalite Ca3(AsO4)2·10H2O and Phaunouxite Ca3(AsO4)2·11H2O are hydrates of calcium arsenate. ==Preparation== Calcium arsenate is commonly prepared from disodium hydrogen arsenate and calcium chloride: :2 Na2H() + 3 CaCl2 → 4 NaCl + Ca3()2 + 2 HCl In the 1920s, it was made in large vats by mixing calcium oxide and arsenic oxide.〔Smith, C.M.; Murray, C.W.; The Composition of Commercial Calcium Arsenate. '' Journal of Industrial and Engineering Chemistry''; 1931, 23〕 In the United States, 1360 metric tons were produced in 1919, 4540 in 1920, and 7270 in 1922.〔 The composition of commercially available calcium arsenate varies from manufacturer to manufacturer. A typical composition is 80-85% of Ca3(AsO4)2 a basic arsenate probably with a composition of 4CaO.As2O5 together with calcium hydroxide and calcium carbonate.〔 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 arsenate」の詳細全文を読む スポンサード リンク
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