华东理工大学学报（自然科学版）2018，Vol.44Issue(1)：70-74,5.DOI:10.14135/j.cnki.1006-3080.20171030001
四川蛇纹石猫眼的拉曼光谱及其颜色相关性
Correlation of Raman Spectroscopy and Colaration of Serpentine Cat's Eye from Sichuan Province
摘要
Abstract
The cat eye effect is precious for serpentine cat's eye,which is very rare around the world,and is found previously only in California from USA,namely,the California's cat's eye.Recently,this rare serpentine cat's eye,with high value of appreciation and collection,was found in Shimian county of Sichuan province,southwest of China.In this paper,electron probe microanalysis (EPMA)、laser Raman、electron paramagnetism resonance spectra (EPR) and nuclear magnetic resonance spectra (NMR) were used to study the serpentine cat's eye samples from Sichuan province.The results indicate that the major average chemical compositions (mass fraction) of the Sichuan serpentine cat's eye are SiO2 (43.56％),MgO(40.52％),FeO+Fe2O3(2.14％) and MnO(0.05％).The major color ions in serpentine cat's eyes from Sichuan province are Fe3+ and Mn2+.The Raman bands of-OH near 3 700 cm-1 of serpentine cat's eyes from Sichuan show a clear difference with those of other ordinary serpentine samples:the Raman bands near 3 700 cm-1 split off and shift to low wavenumbers,which is related to the content of color ion,location of Fe3+ and Mn2+ and the isomorphous substitution degree of Mg2+ with Fe3+ and Mn2+.Fe3+ and Mn2+ occupy the position of Mg2+ in the octahedral Mg-O(OH) of serpentine.The color of the samples changes from lower yellow-green to dark brown green with the increasing of the substitution degree of Mg2+.Therefore,the octahedral Mg O(OH) of serpentine partly divides into octahedral [(Fe3+,Mn2+),Mg2+]-O(OH) as confirmed by 1H-NMR.关键词
蛇纹石猫眼/Raman光谱/1H-NMR/EPRKey words
serpentine cat's eye/Raman spectra/1H-NMR/EPR分类
天文与地球科学引用本文复制引用
杜广鹏,卢保奇,彭景,王旭..四川蛇纹石猫眼的拉曼光谱及其颜色相关性[J].华东理工大学学报（自然科学版）,2018,44(1):70-74,5.基金项目
国家自然科学基金(41572163) （41572163）
