摘要
石榴石族单晶体之间的常规鉴别较难实现,另外,市场上存在较多的黄色钙铝榴石多晶质集合体,并常被用于冒充黄色翡,同样鉴定难度较大。本文通过对各类石榴石单晶体和钙铝榴石多晶质集合体的拉曼光谱测定和分析,得出石榴石中归属于[SiO4]四面体Si-OStr、Si-OBend引起的拉曼位移(A1g模),会随着金属阳离子种类的变化发生规律性偏移,据此可实现石榴石族宝石的品种鉴别;钙铝榴石多晶质集合体的特征拉曼位移在874cm-1、543cm-1、368cm-1附近,与翡翠的拉曼光谱存在明显的差异,容易鉴别。
It is difficult to distinguish different species of monocrystalline garnets tested by conventional instruments, and many yellow grossulars aggregation are counterfeited as jadeites on market, it is also difficult to distinguish between them. This paper was based on Raman spectra testing and analyzing on different species of monocrystalline garnets and grossulars aggregation, it was found that the Raman shifts due to Si-OStr 、Si-OBend of [SiO4 ] tetrahedron in garnets would shift regularly along with the change of category or content of metallic cations, this mechanism could be used to distinguish different species of garnets; The diagnostic Raman shifts of grossulars are about 874cm^-1 、543cm^-1、368cm^-1 , which is obvious different from the Raman spectrum of jadeite, thus it is easy to distinguish between jadeite and garnets.
出处
《应用激光》
CSCD
北大核心
2007年第4期310-313,299,共5页
Applied Laser
关键词
石榴石
拉曼光谱
翡翠
鉴别
Garnet
Raman spectrum
jadeite
identification
