明溪蓝宝石的量子矿物学研究及其颜色的本质  

QUANTUM MINERALOGICAL STUDY ON SAPPHIRES FROM MINXI, FUJIAN AND ITS COLORATION'S ESSENCE

作　　者：温德清 彭明生[2] 

机构地区：[1]金川镍钴研究设计院 [2]中南工业大学

出　　处：《福建地质》1990年第3期228-235,共8页Geology of Fujian

摘　　要：通过野外和室内的综合研究,得出了明溪蓝宝石是在弱还原条件下从碱性玄武岩浆在深部局部熔离分异出来的富铝岩浆中结晶而成的;量子化学计算和矿物谱学研究弄清了蓝宝石成分和结构的特点,说明蓝宝石的颜色是由于过渡金属离子取代铝离子进入畸变八面体位置,引起在晶体场内的跃迁以及三种形式的电荷转移时的跃迁综合作用的结果;笔者认为用传统的“反射”观点来解释蓝宝石的星光效应是错误的,并得出了因成分差异而引起吸收差异从而染上不同色调的新结论。Through synthetical study on field data and indoor analysis, it is showed that the sapphires from Minxi crystallized out of aluminum-plentiful magma differentiated from alkali basalt magma in weak reduction environment. Quantum chemistry computing and mineralogical spectroscopy get at the characteristics of composition and structure of the sapphires, know that colors resulted from transfer ions that exchange aluminum ion, occupy the metabolous octahedral site, so that crystalline field leaps, and form three types of charge transfer. It is mistaken explaining the star-effect of sapphires according to classical 'reflection' idea. The writers get the conclusion that coloring is result of different absorbing due to composition difference.

关 键 词：蓝宝石 量子 矿物学 颜色 

分 类 号：P57[天文地球—矿物学]