Abstract：As the rise of heritage players market in recent years, “Lvlongjing” jade from Russia has become a favorite new gem varietiy. At present, there are disputes over the main mineral composition of the “Lvlongjing”. In this paper, a more detailed research and analysis of the fundamental nature, chemical composition, infrared absorption spectrum characteristics and mineral composition of the “Lvlongjing” from Russia has been made via conventional gemological test, electronic probe, infrared absorption spectroscopy and X-ray powder diffraction method. The result shows that the “Lvlongjing” from Russia is mainly dark green to gray-green in color, with a special surface radial pattern and the typical silky luster. Its refractive index is about 1.57, a density about 2.61 g·cm-3. The SiO2 content of the “Lvlongjing” is about 36.177%~36.651%, MgO content about 36.439%~36.730%, Al2O3 content about 11.961%~12.318%, FeO content about 2.304%~2.853%, showing a magnesium-rich and iron-poor feature. The Al/(Al+Mg+Fe) in samples studied is 0.185 3~0.215 9, suggesting the causes of altered mafic rocks. The Si=3.10~3.40, Fe2+/R2+=0~0.024 8, showing it is a Pennine type. The infrared absorption spectrum is characterized by chlorite vibration peaks. The absorption peak near 3 673 cm-1 in high frequency region is caused by the OH stretching vibration. The absorption peaks near 1 400 cm-1 belong to OH bending frequency. Three peaks near 1 000 cm-1 are caused by the Si—O stretching vibration. The absorption bands between 400 to 600 cm-1 belong Si—O bending vibration. Three split absorption peaks near 1 000 cm-1 in the intermediate frequency region, including 1 051, 1 006 and 968 cm-1 can be identified as key evidence of the Pennines. The analysis results of X-ray powder diffraction are consistent with the chemical composition and infrared absorption spectrometry analysis, showing the major component mineral of “Lvlongjing” from Russia is Pennine, instead of Clinochlore.
陈全莉，王谦翔，金文靖，余伊彤. 俄罗斯“绿龙晶”的成分和结构特征研究[J]. 光谱学与光谱分析, 2017, 37(07): 2225-2229.
CHEN Quan-li, WANG Qian-xiang, JIN Wen-jing, YU Yi-tong. Study on the Composition and Structure Characteristics of “Lvlongjing” from Russia. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(07): 2225-2229.
