Abstract

The reaction between rare earth oxychloride (REOCl) and water was investigated. X-ray diffractometer, volumetric titrations, FTIR spectrograph and scanning electron microscope were used to determine the reaction process and the reaction products. It was found that the reaction could be concluded as follows: 5REOCl(s) + 5H₂O(l) = 2RE₂(OH)₅Cl(s) + RE³⁺(aq) + 3Cl⁻(aq). Based on this reaction, a new method for determining the purity of anhydrous rare earth chloride was proposed. Compared with the conventional method, the maximum absolute error decreased from 22 to < 1% and the maximum relative error decreased from 111 to < 4% under the experimental conditions.

Graphic abstract

中文翻译：

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REOCl（RE = Y，Gd和Sm）与H 2 O之间的反应的测定和应用

摘要

研究了稀土氧氯化物（REOCl）与水之间的反应。用X射线衍射仪，体积滴定仪，FTIR光谱仪和扫描电子显微镜确定反应过程和反应产物。结果发现，如下所述反应可以得出结论：5REOCl（多个）+ 5H ₂ O（1）= 2RE ₂（OH）₅ Cl（上多个）+ RE ³⁺（水溶液）+ 3CL ^{- （}水溶液）。基于该反应，提出了测定无水稀土氯化物纯度的新方法。与常规方法相比，在实验条件下，最大绝对误差从22％降至<1％，最大相对误差从111％降至<4％。

图形摘要