摘要
近年来,危地马拉翡翠在我国珠宝交易市场中备受关注,其中绿色及灰蓝色品种最为常见。本研究以蓝紫色危地马拉翡翠为研究对象,在常规宝石学测试的基础上,结合红外光谱、X射线荧光光谱(XRF)、拉曼光谱等分析测试技术,对其宝石学特征、光谱学特征及颜色成因进行了系统研究。结果表明,蓝紫色危地马拉翡翠的主要矿物组分为硬玉,其红外光谱和拉曼光谱均显示出硬玉的特征峰。DiamondView^(TM)下样品具有黄绿色荧光。结合此荧光特征和XRF测试结果,表明样品中Fe和Ti含量较高;而Mn含量相对偏低。紫外-可见吸收光谱显示,614 nm和538 nm处分别存在由Fe^(2+)-Ti^(4+)和Fe^(2+)-Fe^(3+)电荷转移引起的吸收带,表明其致色成因与Fe^(2+)、Fe^(3+)、Ti^(4+)密切相关。
In recent years,Guatemalan jadeite has received more attention in China’s gemstone trading market,with green and gray-blue varieties being the most commonly encountered.This study focuses on blueish-violet Guatemala jadeite as the research subject.Building on conventional gemological testing,infrared spectroscopy,X-ray fluorescence spectroscopy(XRF)and Raman spectroscopy were employed to conduct an in-depth investigation into its gemological characteristics,spectroscopic properties,and color origin.The results indicate that the primary mineral composition of blueish-violet Guatemala jadeite,with characteristic peaks of jadeite identified in both infrared and Raman spectroscopy.DiamondView^(TM)samples have yellow-green fluorescence.Combined with the fluorescence characteristics and XRF test results,it shows that the Fe and Ti contents in the sample are relatively high,while the Mn content is relatively low.Ultraviolet-Visible absorption spectroscopy(UV-Vis)revealed absorption bands at 614 nm and 538 nm,attributed to Fe^(2+)-Ti^(4+)and Fe^(2+)-Fe^(3+)charge transfers,respectively,suggesting that the coloration is associated with Fe^(2+),Fe^(3+),and Ti^(4+).
作者
张莲
陆太进
ZHANG Lian;LU Taijin(National Gemological Training Center,Shanghai 200021,China;National Gems&Jewelry Technology Administrative Center,Ministry of Natural Resources,Beijing 100013,China)
出处
《光散射学报》
北大核心
2025年第4期751-756,共6页
The Journal of Light Scattering
