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氧化锎

氧化锎
别名 倍半氧化锎
三氧化二锎
识别
CAS号 12050-91-8  checkY
SMILES
 
  • [Cf+3].[Cf+3].[O-2].[O-2].[O-2]
性质
化学式 Cf2O3
摩尔质量 550 g·mol−1
外观 黄绿色固体[1]
熔点 1750 °C[1]
结构
空间群 Ia3 (No. 206)
热力学
ΔfHm298K −1652.6 ± 10.3 kJ•mol−1[2]
相关物质
其他阳离子 氧化镝
三氧化二锫
三氧化二锿
相关化学品 二氧化锎
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

氧化锎的一种氧化物化学式 Cf2O3。由于所有锎的同位素都是人造的,氧化锎也不存在于自然界。

性质

氧化锎是一种黄绿色固体,熔点 1750 °C[1]。它是体心立方晶系的,晶格参数为 a = 1083.9 ± 0.4 pm[3][4] 立方和单斜的 Cf2O3 的转变温度为 1400 °C。[5]

它的标准生成焓在 25 °C 是 −1652.6 ± 10.3 kJ•mol−1[2]

用处

它可以用来制作 252Cf-中子源。首先,252Cf(III) 会被做成草酸盐 (Cf2(C2O4)3) ,然后分解形成氧化锎。[6]

参考资料

  1. ^ 1.0 1.1 1.2 Holleman, Arnold Frederik; Wiberg, Egon, Wiberg, Nils , 编, Inorganic Chemistry, 由Eagleson, Mary; Brewer, William翻译, San Diego/Berlin: Academic Press/De Gruyter, 2001, ISBN 0-12-352651-5 
  2. ^ 2.0 2.1 Lester R. Morss, J. Fuger, J. Goffart, N. Edelstein, G. V. Shalimoff: Enthalpy of Formation and Magnetic Susceptibility of Californium Sesquioxide, Cf2O3, in: Journal of the Less Common Metals, 1987, 127, S. 251–257 (doi:10.1016/0022-5088(87)90385-7).
  3. ^ J. L. Green, B. B. Cunningham: Crystallography of the Compounds of Californium. I. Crystal Structure and Lattice Parameters of Californium Sesquioxide and Californium Trichloride, in: Inorg. Nucl. Chem. Lett., 1967, 3 (9), S. 343–349 (doi:10.1016/0020-1650(67)80040-0).
  4. ^ J. C. Copeland, B. B. Cunningham: Crystallography of the Compounds of Californium. II. Crystal Structure and Lattice Parameters of Californium Oxychloride and Californium Sesquioxide, in: J. Inorg. Nucl. Chem., 1969, 31 (3), S. 733–740 (doi:10.1016/0022-1902(69)80020-5).
  5. ^ R. D. Baybarz, R. G. Haire, J. A. Fahey: On the Californium Oxide System, in: J. Inorg. Nucl. Chem., 1972, 34 (2), S. 557–565 (doi:10.1016/0022-1902(72)80435-4).
  6. ^ United States Patent 3627691: A Method of Preparing a Californium-252 Neutron Source页面存档备份,存于互联网档案馆).

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氧化锎
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