采用X射线衍射(X-ray diffraction,简称XRD)、电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,简称ICP-MS)、扫描电子显微镜(scanning electron microscope,简称SEM)对粉红贝贝壳的化学成分、结构特征进行研究。探讨珍珠层的成色机制,结果表明,粉红贝贝壳无机相由95.67%的文石和4.33%的方解石组成;粉红贝贝壳在珍珠质层中的文石为圆角六边形,呈堆垛式排列,在棱柱层单个棒柱结构中的文石以假六边形薄片形式呈叠瓦状排列;粉红贝贝壳内表面珍珠质层的文石厚度越靠近棱柱层越薄;内表面珍珠质层可以分为核心区与过渡区,核心区为螺旋生长结构,过渡区为堆垛结构;粉红贝贝壳的珍珠层具有一维光子晶体的结构特点,结构与色素共同作用使其产生独特的颜色和晕彩。
The characteristics of the rough jadeite crust are closely related to its internal quality.The man made crust is rather misleading.According to the results from naked eye,X ray diffraction and infrared spectra analysis,this paper discusses the mineralogic characteristics of the true and imitative crust of the rough jadeite,and puts forward the method of identification.
