Uranate - Uranyl

Japanese: ウラン酸塩 - ウランサンエン
Uranate - Uranyl
A general term for compounds with the formula M I 2 U n O 3 n +1 (M I is a monovalent metal, n = 1 to 6). When n = 1, M I 2 UO 4 is called a (mono)uranate, when n = 2, M I 2 U 2 O 7 is called a diuranate (commonly known as a biuranate), and when n = 3, M I 2 U 3 O 10 is called a triuranate. In addition, the term may also include M I 4 UO 5 and M II 3 UO 6. They are generally orange or yellow crystals. The most commonly known are diuranates; for example, when a metal hydroxide is added to an aqueous solution of uranyl (VI) salt [UO 2 ]X 2 (X is a monovalent acid group), a precipitate forms, and when ammonia is added, ammonium diuranate (NH 4 ) 2 U 2 O 7 is obtained.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
一般式MI2UnO3n+1(MIは1価金属,n=1~6)で表される化合物の総称。n=1のときのMI2UO4を(一)ウラン酸塩,n=2のMI2U2O7を二ウラン酸塩(俗に重ウラン酸塩ともいう),n=3のMI2U3O10を三ウラン酸塩などという。なお,このほかにMI4UO5,MII3UO6などを含めていうこともある。一般に橙色ないし黄色の結晶である。最も普通に知られているのは二ウラン酸塩で,たとえばウラニル(VI)塩[UO2]X2(Xは1価の酸基)水溶液に金属水酸化物を加えると沈殿し,アンモニアを加えると二ウラン酸アンモニウム(NH4)2U2O7が得られる。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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