祖母绿的红外光谱特征研究

THE STUDY OF INFRARED ABSORPTION PECTROSCOPIC CHARACTERISTICS OF EMERALDS

采用中红外、近红外光谱技术,对中国云南、哥伦比亚产出的祖母绿中的水进行了初步研究。结果表明:祖母绿中Ⅰ型水和Ⅱ型水之间弯曲振动和伸缩振动的频率和强度是不同的,Ⅱ型水的振动频率和强度大于Ⅰ型水;根据祖母绿中是否含水以及水的赋存状态,可为准确鉴别祖母绿提供重要依据。

In this paper, water in emeralds from Yunnan province of China and Colombia has been determined and researched by infrared and nearinfrared absorption spectra test. The study shows that the frequency and intensity of the bending vibration and stretching vibration between typeⅠH2O and typeⅡH2O are different and the vibrations for the latter(typeⅡH2O) exceed those for the former(typeⅠH2O). It can provide important information for appraising natural and synthetic emeralds, according to water and its exist conditions in emeralds.