Synthesis, Raman and Rietveld analysis of thorium diphosphate

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• 作者：Nicolas Clavier ; Gilles Wallez ; Nicolas Dacheux ; Damien Bregiroux ; Michel Quarton ; Patricia Beaunier
• 关键词：Phosphates ; Actinides ; Rietveld analysis ; Raman spectroscopy ; Crystal structure
• 刊名：Journal of Solid State Chemistry
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：181
• 期：12
• 页码：3352-3356
• 全文大小：435 K

文摘

We report the synthesis of thorium diphosphate ThP₂O₇ and its study by Raman spectroscopy and Rietveld analysis. This compound has been found to be closely related to the zirconium diphosphate type, with space group Pa-3 and a=8.7601(3) Å. No superstructure was observed. The metastability of ThP₂O₇ appears to stem from the six-fold oxygen environment of Th^IV, a unique case in the structural chemistry of this cation.