Synthesis and Crystal Structure of Cs4[UO2(CO3)3]

IF 1 Q4 CHEMISTRY, INORGANIC & NUCLEAR Radiochemistry Pub Date : 2004-01-01 DOI:10.1023/B:RACH.0000024627.56487.31

S. V. Krivovichev, P. C. Burns

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引用次数: 7

Abstract

Light green transparent crystals of Cs₄[UO₂(CO₃)₃] were prepared by evaporation from aqueous solutions. The crystal structure was refined to R ₁ = 0.039 (wR ₂ = 0.081) for 2311 reflections with |Fhkl|≥ 4σ|Fhkl|. Monoclinic system, space group C2/c, a = 11.5131(9), b = 9.6037(8), c = 12.9177(10) ?, β = 93.767(2)°, V = 1425.2(2) ?³. The structure of Cs4[UO2(CO3)3] consists of isolated complex ions [UO₂(CO₃)₃]⁴ ^- formed by uranyl cation UO₂ ² ⁺ and three CO₃ ² ^- groups. The equatorial planes of the [UO₂(CO₃)₃]⁴ ^- ions are approximately parallel to the (201) plane. The nine-coordinate Cs⁺ cations are located between the complex anions. The compound is isostructural with M4[UO2(CO3)3] with M = K, NH₄, and Tl, but not isostructural with Na₄[UO₂(CO₃)₃].

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Cs4[UO2(CO3)3]的合成及晶体结构

用蒸发法制备了浅绿色透明的Cs4[UO2(CO3)3]晶体。对于2311次反射，当|Fhkl|≥4σ|Fhkl|时，晶体结构细化为R1 = 0.039 (wR2 = 0.081)。单斜系，空间群C2/c, a = 11.5131(9)， b = 9.6037(8)， c = 12.9177(10) ?， β = 93.767(2)°，V = 1425.2(2) ?Cs4[UO2(CO3)3]的结构是由铀酰阳离子UO22+和三个CO32-基团形成的孤立的络合离子[UO2(CO3)3]4-组成。[UO2(CO3)3]4-离子的赤道平面近似平行于(201)平面。九坐标的Cs+阳离子位于复合阴离子之间。该化合物与M = K、NH4和Tl的M4[UO2(CO3)3]同构，与Na4[UO2(CO3)3]不同构。

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来源期刊

Radiochemistry CHEMISTRY, INORGANIC & NUCLEAR-

CiteScore

1.30

自引率

33.30%

发文量

期刊介绍： Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.