山东昌乐蓝宝石生长环带的FTIR和LA-ICP-MS 研究

山东昌乐蓝宝石生长环带的显微红外光谱和LA-ICP-MS研究结果表明：蓝宝石中的环带颜色成因与晶格中的-OH有相应的关系。在内部含有六边形环带的蓝宝石中，同一环带上的-OH含量相近；不同颜色环带中的-OH含量不相同，其中暗带中的-OH含量最高，过渡带次之，亮带为零；环带中-OH含量与微量元素Ti成正相关，可以用于反映蓝宝石形成过程中环境的变化。当环境中的含氢量较高时，会有较多的Ti4+-Fe2+对替代Al3+进入蓝宝石晶格；当环境中的含氢量较低时，则较少或者没有Ti4+-Fe2+对替代Al3+进入蓝宝石晶格；充分考虑蓝宝石晶格中-OH的分布特征，有利于为蓝宝石的呈色机理研究、高品质蓝宝石合成与优化等提供新的科学思路。

FTIR Spectra and LA-ICP-MS Research of Growth Zones in Sapphire Bands from Changle,Shandong Province

The results of micro-infrared spectra and LA-ICP-MS research of growthzones in sapphire showed that there was an internal relationship between the formationof color of growth zone and -OH content in sapphire. In the sapphire which contained hexagonal growth zones, the content of -OH was similar in the same zone and varied from zone to zone. The content of -OH decreased gradually from dark growth zone to light growth zone. The content of -OH depended on the content of trace element Ti in the zones, which suggested that the content of -OH in the growth zones could be used to reflect the change rules of the formation process of sapphire. In the higher hydrogen condition, more Ti4+/Fe2+ substituted Al3+ into the sapphire crystal lattice. Otherwise, less or no Ti4+/Fe2+ substituted Al3+ into the sapphire crystal lattice. Therefore, systematic research of the distribution characteristic of -OH in the sapphire will be conducive to the formation mechanism of color of sapphire and provide new scientific ideas for high quality sapphire synthesis and optimization.