一种新型绿松石仿制品的谱学特征研究

发布时间：2018-05-15 04:37

  本文选题：绿松石 + 仿制品　； 参考：《光谱学与光谱分析》2016年09期

【摘要】：近年来,一种绿松石的伴生石矿物作为绿松石仿制品在市场上出现,被称为"紫罗兰"、"白水牛"等,日益受到消费者的欢迎。通过常规宝石学基本测试及X射线荧光光谱仪、傅里叶变换红外光谱仪、X射线粉晶衍射仪、扫描电镜、紫外-可见光分光光度计等测试技术,对市场上这种称做绿松石伴生石的玉石进行了化学成分、矿物组成、微观结构和光谱特征的综合测试分析,并对其呈色机制进行了探讨。X射线荧光光谱显示样品的化学成分较复杂,不同颜色的样品所含元素基本一致,主要有Ca,Al,P,Cu,Si,K,Fe和Ba等元素;根据样品红外光谱的峰位及强度可以推断样品所含的阴离子团主要是PO_4~(3-);由样品的X射线粉晶衍射可推断该玉石主要矿物为纤磷钙铝石、磷钙铝石;扫描电镜显示样品致密,由无数鳞片状、叶片状及不规则粒状集合体组成;通过对可见光吸收光谱的分析,推测样品是由Fe~(3+)离子中的电子跃迁致色,Fe~(3+)含量不同导致样品颜色不同。
[Abstract]:In recent years, a turquoise associated stone mineral as a turquoise imitation in the market, known as "Violet", "White Buffalo" and so on, is increasingly popular with consumers. The basic test of gemology, X-ray fluorescence spectrometer, Fourier transform infrared spectrometer, X-ray powder diffractometer, scanning electron microscope, UV-Vis spectrophotometer, etc. The chemical composition, mineral composition, microstructure and spectral characteristics of this kind of jade called turquoise associated stone in the market have been comprehensively tested and analyzed. The mechanism of color formation was discussed. X-ray fluorescence spectra showed that the chemical composition of the samples was more complex, and the elements contained in the samples of different colors were basically the same. According to the peak position and intensity of the infrared spectrum of the sample, it can be inferred that the anion group contained in the sample is mainly PO _ 4 / P _ 3-C; the X-ray powder diffraction of the sample can infer that the main mineral of the jade is fibronecalcium, phosphor calcium aluminate; the sample is densified by scanning electron microscope. The samples are composed of numerous scale-like, leaf-shaped and irregular granular aggregates. By the analysis of visible light absorption spectra, it is inferred that the samples are different in color due to the different contents of electron transition chromophores in Fe~(3 ions.
【作者单位】： 中国地质大学(武汉)珠宝学院;河南省产品质量监督检验院;
【基金】：湖北省高等学校人文社会科学重点研究基地-珠宝首饰传承与创新发展研究中心基金项目(CJHIXM201405)资助
【分类号】：O657;TS933
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本文编号：1891020