摘要
随着新型材料合成技术的发展,利用助熔剂法培育祖母绿的技术日渐成熟,合成产品充斥市场,不仅给消费者造成了经济损失,也给珠宝鉴定工作带来了挑战。利用宝石折射仪、密度测试仪、宝石显微镜、傅里叶变换红外光谱仪和紫外-可见光光纤光谱仪等仪器,对天然祖母绿和助熔剂法培育祖母绿的宝石学参数进行测定和比对分析,探究最佳的鉴别方法。研究发现:1)两种祖母绿的折射率、光性、密度非常相近,难以区分,采用宝石折射仪和密度测试仪进行鉴别不可行。2)根据紫外-可见光光谱测定结果,天然祖母绿和助熔剂法培育祖母绿分别存在Fe^(3+)的吸收峰和Cr^(3+)的吸收峰;根据红外光谱测定结果,天然祖母绿具有水分子-OH羟基的吸收峰而助熔剂法培育祖母绿不具有,与紫外-可见光光谱测定结果构成相互验证。3)通过显微放大观察,两种祖母绿在包体和洁净程度上有明显区别,但这并非是鉴别二者的直接证据,仅能起到辅助和参考作用。
With the development of new material synthesis technology,the technology of cultivating emeralds by the flux method is becoming more and more mature,and synthetic products are flooding the market,which not only causes economic losses to consumers,but also brings challenges to jewelry identification.Gemmological parameters of natural emeralds and flux-cultivated emeralds were measured and compared by using gem refractometer,density tester,gem microscope,Fourier transform infrared spectrometer and ultraviolet-visible optical fiber spectrometer,and the best identification method was explored.Findings:1)The refractive index,optical properties and density of the two emeralds are very similar,so it is difficult to distinguish the two emeralds using them,and it is not feasible to distinguish the two emeralds by using gem refractometer and density tester.2)According to the ultraviolet-visible spectrum measurement results,natural emeralds and flux-cultivated emeralds have Fe^(3+)absorption peaks and Cr^(3+)absorption peaks,respectively;according to the infrared spectrum measurement results,the natural emeralds have the absorption peak of water molecule-OH hydroxyl group,but the flux-cultivated emeralds do not,which is mutually verified with the ultraviolet-visible spectrum measurement results.3)Through microscopic observation,there are obvious differences between the two emeralds in inclusion and cleanliness,but this is not the direct evidence to identify the two emeralds,and it can only play an auxiliary and referencerole.
作者
盛志远
辛虹瑾
付东阳
罗艳梅
叶鹏
SHENG Zhiyuan;XIN Hongjin;FU Dongyang;LUO Yanmei;YE Peng(Hunan Geological Experiment and Testing Center,Changsha 410007,China;Hunan Consumer Rights Protection Service Centre,Changsha 410004,China)
出处
《工业技术创新》
2022年第4期109-113,共5页
Industrial Technology Innovation
关键词
祖母绿
助熔剂法
红外光谱
紫外-可见光光谱
鉴别
Emerald
Flux Method
Infrared Spectrum
Ultraviolet-Visible Spectrum
Identification
