蓝宝石与相似宝石的拉曼光谱研究

蓝宝石是世界五大名贵宝石之一,优质蓝宝石较为稀少,因此市场上蓝宝石的仿制品也很多.本文通过对蓝宝石、堇青石、蓝色托帕石、海蓝宝石和蓝晶石的拉曼光谱进行测试与研究,得到蓝宝石具有由Al-O振动引起的特征拉曼位移413cm-1,640cm-1和668cm-1;堇青石具有由Si-O振动引起的特征拉曼位移550cm-1,662cm-1,964cm-1和1176cm-1;海蓝宝石具有由Si-O振动引起的特征拉曼位移678cm-1,1064cm-1,1232cm-1;蓝色托帕石具有由Si-O振动引起的特征拉曼位移844cm-1和924cm-1;蓝晶石具有由Si-O引起的特征拉曼位移933cm-1和1133cm-1.根据拉曼位移的位置和强度,可无损、快速、有效地区分蓝宝石、堇青石、海蓝宝石、蓝色托帕石和蓝晶石.

Study on Raman Spectra of Sapphire and its Similar Gemstones

Sapphire is one of the five most precious gemstones, the sapphires of top quality are rare, so there are many imitations in the market. In this paper,the Raman spectrum were used to study sapphire, dichroite, aquamarinl, topaz and kyanite,it is found that the characteristic Raman translocations of sapphire which are caused by Al -O vibration are 413cm l ,640cm^-1 and 668cm^-1 ,the characteristic Raman translocations of dichroite which are caused by Si - 0 vibration are 550cm^-1,662cm^-1, 964cm^-1 and 1176cm-l, the characteristic Raman translocations of aquamarinl which are caused by Si - 0 vibration are 678cm^-1 , 1064cm^-1, 1232cm^-1, the characteristic Raman translocations of topaz which are caused by Si - 0 vibration are 844cm^-1 and 924cm^-1, and the characteristic Raman translocations of kyanite which are caused by Si -O vibration are 933cm^-1 and 1133cm^-1. According to the position and intensity of each characteristic Raman translocation, sapphire, dichroite, aquamarinl, topaz and kyanite can be quickly and effectively set apart without any damage to these gemstones.