K2Ca4[(UO2)(Si2O7)2]: A Uranyl Silicate with a One-Dimensional Chain Structure

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• 作者：Chia-Lin Liu ; Hsin-Kuan Liu ; Wen-Jung Chang ; Kwang-Hwa Lii
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：September 8, 2015
• 年：2015
• 卷：54
• 期：17
• 页码：8165-8167
• 全文大小：253K
• ISSN：1520-510X

文摘

A new uranyl silicate, K₂Ca₄[(UO₂)(Si₂O₇)₂], with a 1D chain structure has been synthesized from a solution of mixed alkali- and alkaline-earth-metal cations under hydrothermal conditions at 550 掳C and 1400 bar and characterized by single-crystal X-ray diffraction and photoluminescence spectroscopy. It crystallizes in the triclinic space group P1虆 (No. 2) with a = 6.6354(2) 脜, b = 6.6791(2) 脜, c = 9.6987(3) 脜, 伪 = 98.324(2)掳, 尾 = 93.624(2)掳, 纬 = 112.310(2)掳, and Z = 1. Its crystal structure consists of a 1D chain of uranyl disilicate formed of corner-sharing UO₆ tetragonal bipyramids and Si₂O₇ double groups. The adjacent chains are separated by K⁺ and Ca²⁺ cations. It is the first example of uranyl silicate with a 1D chain structure.