秘鲁蓝色蛋白石矿物学性质及致色机理初探

发布时间：2018-06-17 15:29

本文选题：红外光谱 + 矿物组成　；参考：《岩矿测试》2017年06期

【摘要】：近年来蓝色蛋白石的研究仅限于矿物成分及致色机理,并未对其化学成分、红外光谱、拉曼光谱等开展较为深入的分析。本文在前人的研究基础上,通过傅里叶变换红外光谱(FTIR)、X射线粉晶衍射(XRD)、电子探针分析(EMPA)、紫外可见分光光谱、拉曼光谱等技术对样品的振动光谱、官能团表征、矿物组成及呈色机理进行研究。研究结果表明:蓝色蛋白石的主要组成矿物为非晶态蛋白石,且振动光谱与天然蛋白石存在一定程度的频率位移。EMPA分析结果显示蓝色蛋白石主要元素为Si和Cu,且紫外可见分光光谱表征为742 nm附近一吸收强度较高的宽谱带。综合电子探针和紫外可见吸收光谱的测试结果得出,蓝色蛋白石的致色元素为Cu,在其内部呈典型平面正方形结构的[Cu~(2+)(H_2O)_4]~(2+),且Cu含量与其蓝色的体色存在一定的正相关性,即随着Cu含量增加蓝色体色更加浓艳。
[Abstract]:In recent years, the study of blue opal is limited to mineral composition and chromatic mechanism. The chemical composition, infrared spectrum and Raman spectrum of Blue Opal have not been deeply analyzed. On the basis of previous studies, this paper is based on Fourier transform infrared spectroscopy (FTIR), X ray powder diffraction (XRD), electron probe analysis (EMPA) and UV visible spectroscopic spectroscopy. The vibration spectra, functional group characterization, mineral composition and color presentation mechanism of the samples are studied by Raman spectroscopy. The results show that the main mineral composition of the blue opal is amorphous opal, and the vibration spectrum and natural opal have a certain degree of frequency displacement.EMPA analysis results show that the main elements of Blue Opal are the main elements of the opal. Si and Cu, and the UV visible spectroscopy is characterized by a wide band with high absorption near 742 nm. Comprehensive electron probe and UV visible absorption spectra show that the chromatic elements of Blue Opal are Cu, in which the [Cu~ (2+) (2+) (H_2O) _4]~ (2+) of a typical plane square structure is present, and the Cu content and its blue color exist. There is a positive correlation, that is, with the increase of Cu content, the blue body is more colorful.
【作者单位】：华南理工大学广州学院珠宝学院;中国地质大学(武汉)材化学院;同济大学海洋与地球科学学院;
【基金】：国家自然科学基金资助项目(41272049)
【分类号】：P575;P578.494

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