CAJ | 학술논문

采用X射线衍射、红外吸收光谱及扫描电镜等现代测试方法，对“油青种”翡翠的矿物学特征及颜色成因进行了深入研究。X射线衍射分析结果显示，“油青种”翡翠“肉”的矿物组成为较纯的硬玉，而“皮”由硬玉、绿泥石及纤蛇纹石等三种矿物组成。红外吸收光谱分析所揭示的矿物组成与X射线衍射较为一致，同时发现“油青种”翡翠“肉”及“皮”具有～2956，～2919和～2850 cm －1等三个典型有机质的特征吸收峰。“油青种”翡翠“肉”中硬玉呈现明显的柱状，结晶程度明显好于“皮”中的硬玉，但“皮”中硬玉比“肉”中硬玉明显富含Mg ，说明“皮”中硬玉发生过强烈的水／岩反应。纤蛇纹石仅在“油青种”翡翠的“皮”中出现，晶面呈现明显的弯曲状。在“油青种”翡翠“肉”的裂隙处及“皮”中均发现片状绿泥石的存在，可能为“油青种”翡翠致色的主要原因。形成于还原性水／岩反应的绿泥石，会吸附或者包裹一定量的有机质，导致“油青种”翡翠出现有机质的特征吸收峰。
채용X사선연사、홍외흡수광보급소묘전경등현대측시방법，대“유청충”비취적광물학특정급안색성인진행료심입연구。X사선연사분석결과현시，“유청충”비취“육”적광물조성위교순적경옥，이“피”유경옥、록니석급섬사문석등삼충광물조성。홍외흡수광보분석소게시적광물조성여X사선연사교위일치，동시발현“유청충”비취“육”급“피”구유～2956，～2919화～2850 cm －1등삼개전형유궤질적특정흡수봉。“유청충”비취“육”중경옥정현명현적주상，결정정도명현호우“피”중적경옥，단“피”중경옥비“육”중경옥명현부함Mg ，설명“피”중경옥발생과강렬적수／암반응。섬사문석부재“유청충”비취적“피”중출현，정면정현명현적만곡상。재“유청충”비취“육”적렬극처급“피”중균발현편상록니석적존재，가능위“유청충”비취치색적주요원인。형성우환원성수／암반응적록니석，회흡부혹자포과일정량적유궤질，도치“유청충”비취출현유궤질적특정흡수봉。
Mineralogy and coloration of oil-green jadeite jade were investigated using X-Ray diffraction (XRD) ,Fourier trans-form infrared absorption spectroscopy (FTIR) and scanning electron microscopy (SEM ) .XRD results show that “flesh” of oil-green jadeite jade is mainly composed of relatively pure jadeite ,whereas the“skin”of which is dominated by jadeite ,chlorite and chrysotile .The mineral constituents revealed by FTIR are fairly consistent with XRD . Three typical adsorption peaks of~2 956 ,~2 919 and ~2 850 cm -1 related to organic matters occurred in both “flesh”and“skin”of oil-green jadeite jade .Jade-ite in“flesh”exhibits an obvious columnar growth and has a better crystallinity than that of “skin” .However ,jadeite in“skin”is richer in magnesium than that of “flesh” ,suggesting an intense water-rock reaction of jadeite in “skin” .Chrysotile just occurs in“skin”of oil-green jadeite jade ,and it presents a curved crystal plane .Flaky chlorite was detected in both cracks of “flesh”and“skin” ,which might be the main cause of coloration of oil-green jadeite jade .Chlorite ,formed in the reducing water-rock re-action ,would adsorb or w rap a certain amount of organic matters ,resulting in the occurrence of the characteristic adsorptions of oil-g reen jadeite jade .