Chemical behavior of tungstate solutions.: Part 1.: A spectroscopic survey of the species involved

被引：25

作者：

Barré, T

Arurault, L

Sauvage, FX

机构：

[1] CNRS, UMR 8516, LASIR, HEI, F-59046 Lille, France

[2] Balzers Luxembourg, L-4513 Niedercom, Luxembourg

[3] CNRS, UMR 5085, LCMIE, CIRIMAT, F-31062 Toulouse 4, France

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2005年 / 61卷 / 04期

关键词：

tungstate solutions; Raman spectroscopy;

D O I：

10.1016/j.saa.2004.05.005

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

This Study is focused on the composition and the evolution of tungstate ions solutions as a function of pH and increasing concentrations. The Raman analysis showed that, during the titration of the tungstate solutions, WO42-, HWO4- ions and probably W2O72-, HW2O72- and H2W2O7 solvated species could exist in aqueous Solutions. For diluted solutions, additions of a strong acid does not cause any precipitation, whereas the formation of the unstable solid tungstic acid (H2WO4 or WO3.H2O) could occur in concentrated solutions. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：551 / 557

页数：7

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