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盈江铀矿的红外和拉曼光谱
  • ISSN号:1007-1229
  • 期刊名称:江西理工大学学报
  • 时间:0
  • 页码:1-5
  • 语言:中文
  • 分类:P619.14[天文地球—矿床学;天文地球—地质学]
  • 作者机构:[1]江西地勘局赣西地质大队,南昌330201, [2]南昌大学环境科学与工程学院,南昌330031
  • 相关基金:广东省自然科学基金资助(批准号:04300766)和国家自然科学基金资助(批准号:40572024) 致谢:中山大学彭明生教授、广州地球化学研究所肖万生副研究员和王英老师在光谱测试和解释中给了许多帮助,在此深表谢意!
  • 相关项目:铀酰磷酸盐矿物溶解的机理、热力学和动力学研究
作者: 卢龙|
中文摘要:

通过对盈江铀矿振动谱进行分峰拟合操作,更准确地显示出该矿物中不同基团所产生振动谱带的特征,其中,结晶水的伸缩和弯曲振动分别位于3300和1630cm^-1附近,结构水的伸缩和弯曲振动分别位于3300和1400cm^-1。附近;PO4和UO2的伸缩振动位于800-1200cm^-1范围内,而它们的弯曲振动位于700cm^-1以下的范围内. 首次从振动谱研究中获得盈江铀矿中存在结构水的证据,包括:①盈江铀矿的拉曼光谱中,在1400cm^-1附近出现了结构水弯曲振动模式,表明结构水的存在.但此振动模式在红外光谱中没有出现吸收峰,表明此振动很可能仅为拉曼活性;②比较盈江铀矿与钙铀云母在羟基伸缩振动区域的振动谱特征,可以发现盈江铀矿结构中除结晶水外还存在其它形式的水.

英文摘要:

It is clear shown by fitting the infrared and Raman spectra of yingjiangite that the stretching and bending vibrations of water of crystallization occur at about 3300 and 1630 cm^-1, respectively, and those of water of constitution at the neighborhood of 3300 and 1400 cm^-1, respectively, that the stretching vibrations of PO4 and UO2 are located in the range of 800-1200 cm^-1, and their bending vibrations in the range of less 700 cm^-1. Due to narrow band width of PO4 and UO2 units, their Raman spectra shows excellent band separation, avoiding the difficulties in the infrared spectra of complex overlapping bands. Raman bands of PO4 and UO2 unit are mainly presented at around 1000 and 800 cm^-1, respectively. The evidences which there is water of constitution in yingjiangite were obtained from vibrational spectroscopic study, including: ①There are vibrational bands at about 1400 cm^-1 in Raman spectra of yingjiangite, which are the vibrational mode of water of constitution, indicating that structural water was presented in yingjiangite. This vibrational mode, however, does not induce any infrared absorption bands, showing that it is possibly infrared inactive; ② It was shown that yingjiangite contains water of crystallization and other kind water by comparing HOH stretching vibrational bands of yingjiangite with those of autunite.

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