蓝宝石主要致色元素与其颜色关系的实验研究  

The Experimental Study on the Relations between Colors and Colorgenous Elements in Sapphire

作　　者：孙宏娟[1,2] 莫宣学[1,2] 林培英 

机构地区：[1]中国科学院地质研究所 [2]中国地质大学

出　　处：《岩石学报》1998年第3期381-387,共7页Acta Petrologica Sinica

基　　金：国家自然科学基金

摘　　要：蓝宝石的颜色与主要致色元素的含量及其比值以及形成时的氧逸度有密切关系。本实验选用不同色调的蓝宝石，采用定量控制环境氧逸度的热处理方法，控制蓝宝石中主要致色离子的价态和比例。通过实验研究，获得（１）蓝宝石的颜色、透明度与氧逸度之间的关系曲线；（２）山东昌乐蓝宝石颜色与Ｆｅ、Ｔｉ含量及其比值之间关系曲线。Ｃｒ、Ｎｉ、Ｍｎ等多种杂质元素含量高会导致蓝宝石透明度降低，灰色调显著；（３）发现山东昌乐蓝宝石中存在α－Ｆｅ，它是蓝宝石颜色深，透明度差的重要原因之一。The sapphire color has intimate relations with its components and their occurrence. Based on the quantitative experiments of fugacity at high temperature, the following achievements have been worked out: (1) The curve showing the relationship between the color, oxygen fugacity and transitivity of sapphire. (2) The curve displaying the relations between color and the components of sapphire: to some extent, the lower the ratio of ΣFe/Ti, the more beautiful the sapphire is. However, the ration of ΣFe/Ti in the studied sapphire is too high for it to get a bright color;furthermore, there are so many impurities in the sapphire, such as Cr, Ni, Mn, that made the gemstone gray and dull. (3) The existence of α Fe in sapphire as one of the major causes making the sapphire dark and semitransparent.

关 键 词：蓝宝石 实验研究 颜色 致色元素 

分 类 号：P578.44[天文地球—矿物学] P574.11[天文地球—地质学]