摘要
为了深入了解橙色蓝晶石的宝石学特征及其颜色成因,采用X-射线粉晶衍射分析(XRD)、X射线荧光光谱分析(XRF)、紫外-可见光-近红外吸收光谱等现代测试手段对橙色蓝晶石样品进行测试,且与蓝色蓝晶石的矿物学特征进行对比,并探讨样品的颜色成因。结果表明,橙色蓝晶石样品中含有更多的微量元素Fe和Mn。其中,铁的质量分数为0.57%～0.63%,锰的质量分数为0.120%～0.132%。蓝色蓝晶石样品中铁的质量分数为0.31%～0.62%,锰的质量分数低于0.10%。在紫外-可见光-近红外吸收光谱图中,具有Fe^(3+)引起371nm和443nm处的吸收峰,Mn^(3+)引起470nm处的强吸收峰及Mn^(2+)引起418nm的较强吸收峰。橙色蓝晶石为电子跃迁致色,主要致色成因与Mn^(3+)、Mn^(2+)和Fe^(3+)有关,其中Mn是最有可能的致色元素。
In order to investigate the gemological characteristics and its color genesis,orange kyanite samples are studied by X-ray powder diffraction (XRD),X-ray fluorescence spectrometry (XRF) and ultraviolet-visible-near-infrared absorption (UV-Vis) spectrometry.The difference of mineralogical characteristics between orange and blue kyanite is compared.The XRF experimental data show that the orange sample contains more Fe and Mn elements than the blue one.The mass fraction of Fe and Mn in orange sample is 0.57%-0.63% and 0.120%-0.132%,respectively.The mass fraction of Fe element is 0.31%-0.62%(Fe) with less than 0.10% Mn element in blue sample.The UV-Vis spectra demonstrate the strong absorption peaks of 371 nm,443 nm,470 nm,and 418 nm are attributed to Fe^3+, Mn^3+ and Mn^2+ respectively.Electronic transition is the trigger for coloring in orange kyanite. And Mn^3+,Mn^2+ and Fe^3+ are the main color genesis of the orange kyanite,with Mn being the most dominant element.
作者
张莲
高先珂
刘迎新
ZHANG Lian;GAO Xianke;LIU Yingxin(School of Gemmology,China University of Geosciences,Beijing 100083,China;Sino-Danish College,University of Chinese Academy of Sciences,Beijing 101408,China)
出处
《中国科技论文》
CAS
北大核心
2018年第21期2442-2446,共5页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20120022120015)
