Spectra of sodium aluminate solutions

来源期刊：中国有色金属学报(英文版)2007年第4期

论文作者：马淑花 郑诗礼 徐红彬 张懿

文章页码：853 - 853

Key words：sodium aluminate solution; UV spectrum; IR absorption; Raman spectrum; aluminate ion

Abstract: The UV spectra of sodium aluminate solutions were obtained in the sodium oxide concentration range from 59 to 409 g/L and the caustic ratio range from 1.5 to 4.0 to reveal the structure characteristics of them. It is found that a new peak appears at about 370 nm besides peaks at about 220 and 266 nm in all solutions. The new peak is strongly favored by high hydroxide concentration and high caustic ratio. And it only appears when the solutions are prepared by dissolving sodium hydroxide and aluminum hydroxide. In addition, the IR and Raman spectra of sodium aluminate solutions with high alkali concentration and high caustic ratio were measured, and the UV spectra of aqueous solutions of and were measured as well. According to the crystal field theory in coordination chemistry as well as the above spectra characteristics, this new peak at about 370 nm is determined as the evidence of a new species of aluminate ion with a coordination number of 6.

基金信息：the Key Project of the National Natural Science Foundation of China
the National High-Tech Research and Development Program of China