【摘要】 采用红外反射光谱技术,对市面上常见的充填和压制处理绿松石、仿绿松石及天然绿松石制品的红外吸收光谱进行了研究和对比。结果表明:充填处理绿松石制品的红外吸收光谱具有由聚合物中aνs(CH2)反对称伸缩振动和sν(CH2)对称伸缩振动致的吸收谱带(2 934~2 924,2 863~2 854 cm-1)及(νC O)伸缩振动所致的红外吸收特征谱带(1 739~1 718 cm-1);仿绿松石制品中则明显缺乏天然绿松石中的ν(OH)伸缩振动致红外吸收谱带(3 507,3 465 cm-1),并出现由aνs(CH2)反对称伸缩振动和sν(CH2)对称伸缩振动及(νC O)伸缩振动致红外吸收谱带以及由各自基团振动的红外吸收特征谱带(指纹区内)。依据这些特征的红外吸收光谱有助于将它们区分开。更多还原

【Abstract】 By using the infrared reflection spectrum analysis technique,the filled,pressed,imitated and natural turquoises on gem markets are investigated.The results show that the IR peaks at 2 934² 924,2 863² 854 cm^-1 are resulted from the asymmetrical stretching vibration and the symmetrical stretching vibration of CH₂and the strectching vibration of ν（CO） peaks lie at 1 739¹ 718 cm^-1 in polymer of the treated and imitated turquoises.The imitated truquoises have the characteristic spectra of the asymmetrical stretching vibration and the symmetrical stretching vibration of CH₂,and the vibration of ν（CO）and characteristic absorption bands of themselves.But,they lack any typical peaks of stretching vibration of hydroxyl of natural turquoise(3 507,3 465 cm^-1).These typical IR spectra play an important role in distinguishing the treated and imitated turquoises from the natural turquoise.更多还原