摘要:
采用环境扫描电子显微镜(配置能谱仪)对3件靖安古玉器样品的表面微结构及微形貌特征、主要化学成分进行了观察与测试,结果表明,样品均为透闪石质软玉,其外观特征与结构有一定关系。样品G47具有亚透明这一罕见、不同于软玉的外观特征,其透闪石的质量分数最高,晶体较粗大,定向排列,为显微柱状变晶结构;样品G36具典型的油脂光泽、半透明外观特征,其透闪石晶体细小、紧密交织,为显微纤维交织变晶结构;样品G21中受沁较轻的灰白色部分的结构较疏松,有孔洞,其透闪石晶体呈细长纤维状,结晶程度低,为显微纤维—隐晶质变晶结构,受沁较严重的褐色部分则表现为显微粒状微形貌特征。
Abstract:
The surface microstructure,micro-morphology and main chemical compositions of the ancient jade samples G47,G36 and G21 are observed and tested by using the environmental scanning electronic microscope(ESEM) with EDS.The results show that the samples G47,G36 and G21 are tremolite-nephrite,whose appearance characteristics could be related to their structures.The sample G47 is of unusual semitranslucence which differs from the appearance characteristic of nephrite.The tremolite crystals in the sample G47 are thick and directional arrangement with the highest content,being micro-columnar crystalloblastic texture.The sample G36 is of oily luster and translucence,where the tremolite crystals are fine and closely interlocking,being micro-fibrous interlaced crystalloblastic texture.The structure of the gray part is loosen with hole in the sample G21,where tremolite crystals are slender fibrous and low crystalline degree,being micro-fibrous and cryptocrystalline texture.The brown part in the sample G21 shows the micro-granular morphology characteristic.
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