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—O H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.%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 .
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