Nickel sulfate. The anhydrous hydrate has the chemical formula NiSO 4 and a formula weight of 154.8. Mono-, di-, tetra-, hexa- and heptahydrates are known. The heptahydrate occurs naturally as morensite, but it can be obtained as green needles by dissolving nickel, nickel(II) oxide, nickel(II) hydroxide or nickel carbonate in dilute sulfuric acid and evaporating at room temperature. It effloresces in air to a white powder, but returns to green when water is added. It loses four molecules at 100°C, six molecules at 103.3°C, and all water at 279.4°C. It forms the Tutton salt type double salt M I 2 Ni(SO 4 ) 2 6H 2 O with the sulfates of potassium, rubidium, cesium, ammonium and thallium(I). It is used in nickel plating, hydrogenation catalysts, mordants, and the manufacture of pigments. [Torii Yasuo] [Supplementary Material] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
ニッケルの硫酸塩。無水和物の化学式NiSO4、式量154.8。一、二、四、六および七水和物が知られている。七水和物は天然にモレノサイトとして産出するが、ニッケル、酸化ニッケル(Ⅱ)、水酸化ニッケル(Ⅱ)あるいは炭酸ニッケルを希硫酸に溶かし、室温で蒸発濃縮すれば、緑色の針状晶として得られる。空気中で風解して白色の粉末となるが、水を加えると緑色に戻る。100℃で4分子、103.3℃で6分子、279.4℃ですべての水を失う。カリウム、ルビジウム、セシウム、アンモニウム、タリウム(Ⅰ)の硫酸塩とタットン塩型の複塩MI2Ni(SO4)26H2Oをつくる。ニッケルめっき、水素添加触媒、媒染剤、顔料の製造などに用いられる。 [鳥居泰男] [補完資料] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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