“红碧石”的宝石矿物学特征

发布时间：2018-09-10 06:08

【摘要】：近年来,珠宝市场上出现了一种商业名称为"红碧石"的玉石,因其外观,特别是红色的体色与南红相近,常被作为南红的仿制品进行出售。本文采用常规宝石学测试、红外光谱、激光拉曼光谱、X射线粉晶衍射、紫外-可见、近红外光谱等方法,对"红碧石"样品的宝石矿物学特征进行研究。结果表明,"红碧石"整体呈现弱-中等玻璃光泽,折射率范围为1.53~1.54,摩氏硬度为6~7,与石英质玉石基本一致。红外光谱、激光拉曼光谱、X射线粉晶衍射的测试结果表明:"红碧石"的主要组成矿物为石英,次要矿物为赤铁矿和钙铁榴石。近红外光谱中5166~5200 cm~(-1)和4322 cm~(-1)附近的吸收指示了其中分子水及-OH的存在。对紫外-可见-近红外光谱进行一阶求导分析,"红碧石"样品均显示576 nm处赤铁矿的主峰,表明"红碧石"为赤铁矿致色。
[Abstract]:In recent years, a kind of jade named "red and blue stone" has appeared in the jewelry market. Because of its appearance, especially the red body color is similar to the south red, it is often sold as the imitation of the south red. In this paper, the mineralogical characteristics of ruby samples were studied by conventional gemstone testing, infrared spectroscopy, laser Raman spectroscopy, X-ray powder diffraction, UV-Vis and near-infrared spectroscopy. The results show that the whole "Hongbite" has a weak to medium glass-gloss with a refractive index range of 1.53 ~ 1.54 and a hardness of 6 ~ 7, which is basically consistent with that of quartz jade. The infrared spectra and laser Raman spectra of X-ray powder diffraction show that the main mineral is quartz, the secondary minerals are hematite and calcium ferrite. The near infrared absorption near 5166 cm~ (-1) and 4322 cm~ (-1) indicates the presence of water and -OH. The first order derivation analysis of UV-Vis / NIR spectra showed that the main peak of hematite at 576 nm was shown in the samples of "Hongbite", which indicated that "ruby" was hematite chromogenic.
【作者单位】： 成都产品质量检测研究院有限责任公司珠宝中心;中国地质大学(武汉)珠宝学院;中国地质大学(武汉)地球科学学院;
【分类号】：P619.281
，

本文编号：2233593