火欧泊的致色机理研究  

The Study on Color Genesis of Fire Opal

作　　者：潘鑫 PAN Xin(School of Gemmology,China University of Geosciences(Beijing),Beijing 100083)

机构地区：[1]中国地质大学(北京)珠宝学院,北京100083

出　　处：《中国宝玉石》2020年第2期72-77,85,共7页China Gems & Jades

摘　　要：人们通常认为火欧泊的颜色是由于红色/黄色的氧化铁或氢氧化铁颗粒细微分散造成,铁的含量越多,火欧泊颜色越深。但此种认识过于粗糙且抽象,其成分与颜色之间的关系也没有进一步详细的研究,因此火欧泊的致色机理亟待研究。本文选取30颗橙红色系的墨西哥火欧泊作为研究对象,结合前人的研究资料,通过红外光谱和紫外-可见光分光光度计进行谱学测试,通过电感耦合等离子体质谱仪(ICP-MS)测试样品的致色离子含量,探究样品中Fe元素与颜色的相关规律,进一步验证火欧泊的颜色受其内部微量元素含量的影响。It is generally believed that the color of fire opal is caused by the fine dispersion of red or yellow iron oxide or iron hydroxide particles. The more iron content, the deeper the color of fire opal will be. However, this understanding is too rough and abstract, and the relationship between its composition and color has not been further studied in detail. Therefore, the color genesis of fire opal needs to be studied urgently. In this paper, 30 orange-red Mexican opals are selected as the research objects. Based on the previous research data, spectroscopic tests were performed by infrared spectrum and ultraviolet-visible spectrophotometer. Inductively coupled plasma mass spectrometry(ICP-MS) was used to test the chromogenic ion content of the sample to explore the correlation between the Fe element and the color of the sample, and to further verify that the color of the fire opal was affected by its trace element content.

关 键 词：火欧泊 致色机理 颜色 

分 类 号：P584[天文地球—岩石学]