缅甸康地翳珀的氧含量变化特征

Characteristic of Oxygen Content in Black Amber from Myanmar

摘要: 利用傅里叶红外光谱仪（FTIR）和扫描电子显微镜X射线能谱仪（SEM-EDS）对缅甸康地矿区翳珀进行了半定量的氧成分测定，探究翳珀不同部分的氧含量的变化特征。研究结果表明，缅甸翳珀在长波紫外灯下，中心区为中等蓝白色荧光，过渡区为弱黄白色荧光，逐步减弱至外表皮荧光淬灭；含氧基团的振动峰（1 722、1 228、1 158、1 031 cm^-1附近）的相对强度由中心区向近表皮区呈现不均匀增加的趋势；黄色的中心区氧相对含量最低，棕色的过渡区氧相对含量增加，深褐色的外表皮氧相对含量最高。

Abstract: This paper analyzed the oxygen content in black amber from Myanmar with the Fourier transform infrared spectroscopy(FTIR))and scanning electron microscope energy-dispersive X-ray spectroscopy(SEM-EDS) testing.The results showed that the relative intensity of FTIR peaks of oxygen containing groups (at 1 722,1 228,1 158,1 031 cm^-1) cross the core zone to the transition zone to near surface area increase unevenly.With the oxygen content rising, the colour changes from yellow to brown to dark brown, and the specific gravity largens, and on the contrary the fluorescence fades away.