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钠长石玉与仿制品石英岩玉的鉴别特征

SUN Bing, CHEN Ming, BI Yanan,LIU Jinhai, ZHANG Peng,ZHANG Cun

Superhard Material Engineering(2023)

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Abstract
钠长石玉和石英岩玉在外观上极为相似,因此常规检测手段难以区分.通过宝石学常规仪器测试并结合红外光谱和X射线荧光光谱对钠长石玉及其常见仿制品石英岩玉进行了系统研究.结果表明:钠长石玉和石英岩玉在折射率、相对密度等宝石学物理参数方面较为相近.红外吸收光谱揭示两者具有明显不同的吸收峰,X荧光光谱分析表明石英岩玉主要元素为O和Si,SiO2含量高达99%,而钠长石玉主要元素为O、Si、Al、Na,SiO2含量达66.9%,Al2 O3含量为20.3%、Na2 O含量为12.2%.研究可为鉴定钠长石玉和石英岩玉提供必要指示.
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Key words
albite jade,quartzite jade,infrared spectroscopy,identification
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