摘要:
“佘太翠”玉因产于内蒙古巴彦淖尔市乌拉特前旗大佘太地区而得名。采用偏光显微镜、X射线粉末衍射仪、电子探针等研究方法,对白色、绿色、黄色、紫色系列的“佘太翠”玉样品的矿物组成、化学成分、显微结构和呈色机理等进行了测试与研究。结果表明,“佘太翠”玉视颜色品种不同,组成矿物略有差异。除白色品种的“佘太翠”玉以白云石(质量分数高于60%)为主要矿物外,其它颜色品种的均以石英为主要矿物,石英的质量分数约占80%以上。“佘太翠”玉的次要矿物主要有云母、方解石、长石、赤铁矿、叶蜡石、伊利石、高岭石等。绿色“佘太翠”玉在查尔斯滤色镜下变红,主要由铬云母致色,属东陵石;白色品种“佘太翠”玉为白云石玉,而黄色的及其它颜色的品种为石英岩玉。
Abstract:
"Shetaicui" jade is named after the location of its origin,the Dashetai area of Wulateqian Qi,Bayan Nur city,Inner Mongolia.The mineral components,chemical compositions,microstructure and colour-causing mechanism of white,green,yellow,purple series of "Shetaicui" jade are studied with the help of polarizing microscope,X-ray powder diffraction(XRD),electron microprobe.The results show that the mineral component is slightly different among those different colours of "Shetaicui" jade.The typical mineral component is quartz(about 80%) in most colours of the "Shetaicui" jade,except for the white one,which contains plenty of dolomite(higher than 60%).And the secondary mineral components in "Shetaicui" jade are mica,calcite,feldspar,hematite,pyrophyllite,illite,kaolinite.The colour of the green "Shetaicui" jade is changed to red under Charles filter,which is caused mainly by chromium mica.So,the green "Shetaicui" jade belongs to aventurine.In addition,the white "Shetaicui" jade is one of the dolomite jade,and the yellow and other coloured ones belong to quartzite jade.
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