摘要
使用岛津IRPrestige-21傅里叶红外光谱仪,采用波数范围为4 000cm^(-1)~400cm^(-1)的中红外波段,利用KBr压片法对11种常见的无水碳酸盐矿物进行分析研究,发现无水碳酸盐类矿物具4个基频振动带,为1 449cm^(-1)~1 392cm^(-1),750cm^(-1)~675cm^(-1),886cm^(-1)~835cm^(-1)和1 051cm^(-1)±。同时出现3 020cm^(-1)~2 972cm^(-1),2 892cm^(-1)~2 873cm^(-1)的倍频峰和2 520cm^(-1)~2 510cm^(-1),1 820cm^(-1)~1 785cm^(-1)的和频峰。文石族矿物的弯曲振动吸收峰随着阳离子质量的增大振动吸收峰向右偏移,方解石族矿物未见此变化。未发现振动吸收峰的变化与阳离子的离子半径间存在简单线形关系。根据基团频率可确定未知矿物的类别,同时收录矿物的标准图谱可用于对未知矿物的快速鉴定。
Eleven kinds of common anhydride carbonate minerals are analyzed by KBr pallets,using SHIMADZU IRPrestige-21 FTIR Spectrometer under the wave number of 4 000 cm^-1 -400 cm^-1 in middle-infrared band. The anhydride carbonate minerals show four fundamental bands of 1 449 cm^-1-1 392 cm^-1 ,750 cm^-1-675 cm^-1 ,886 cm^-1 -835 cm^-1and 1 051 cm^-1 q-respectively. Meanwhile two double fundamental bands,3 020 cm-1 -2 972 cm^-1 and 2 892 cm^-1-2 873 cm^-1 ,and two combination bands,2 520 cm^-1- 510 cm^-1 and 1 820 cm^-1-1 785 cm^-1 ,are also discovered. The bending bands of Aragonite group materials shift to the right with the increasing mass of cation,but this trend was not discovered in calcite minerals. No linear corelation is found between the vibration absorption peak position and the cation radius. Unknown mineral categories could be identified according to the frequency of the group and quick identification can be achieved through stored mineral standard maps.
出处
《矿物岩石》
CAS
CSCD
北大核心
2015年第4期37-42,共6页
Mineralogy and Petrology
基金
国土资源部公益性行业科研专项经费项目(No.201211043)
关键词
红外光谱
无水碳酸盐矿物
峰位
快速鉴定
FTIR
anhydride carbonate minerals
peak position
quick identification
