内蒙古黄岗梁红色萤石的宝石学特征

Gemological Characteristics of Red Fluorite in Huanggangliang, Inner Mongolia

摘要: 本文选取产自内蒙古黄岗梁矿区的颜色呈现罕见红色的萤石为研究对象，采用常规宝石学测试手段并结合使用紫外–可见光谱、红外光谱、电子探针等现代测试研究方法，初步阐明此类红色萤石的宝石学特征，为其鉴定及研究提供一定参考依据。测试分析结果表明，内蒙古黄岗梁红色萤石的长波紫外光下显示深浅不一的紫粉色荧光，伴有少量磷光；紫外–可见光谱检测在260~280 nm范围内出现多处吸收峰；红外光谱与萤石标准图谱一致；电子探针测试Y元素含量明显高于其他微量元素且在萤石中分布集中。推测内蒙古黄岗梁红色萤石的致色元素最可能为钇。

Abstract: In this paper, fluorite with rare red color from Huanggangliang mining area in Inner Mongolia was selected as the research object, and conventional gemological testing methods were used to combine modern testing methods such as ultraviolet-visible spectroscopy, infrared spectroscopy, electron probe and other modern testing methods to preliminarily clarify the gemological characteristics of such red fluorite, so as to provide a certain reference for its identification and research. The test and analysis results showed that the long-wave ultraviolet light of Huanggangliang red fluorite in Inner Mongolia showed different shades of purple-pink fluorescence, accompanied by a small amount of phosphorescence. UV-Vis spectroscopy detects multiple absorption peaks in the range of 260-280nm; The infrared spectrum is consistent with the fluorite standard pattern; The content of Y element in the electron probe test was significantly higher than that of other trace elements and was concentrated in fluorite. It is speculated that the most likely color element of red fluorite in Huanggangliang in Inner Mongolia is yttrium.