摘要
从泰国一宝石处理商处获得一批未经热处理和热处理的缅甸红宝石,对其基本宝石学特征、化学成分、红外光谱及紫外-可见吸收光谱进行测试分析,以期获得经热处理后的红宝石的特征,并与未经热处理的缅甸红宝石相区别。测试结果表明:热处理红宝石内有大量的次生熔体包裹体,而未经热处理红宝石内仅观察到矿物晶体包裹体以及流体包裹体;在化学成分上,热处理红宝石中的Ti元素平均含量较高,Fe元素平均含量较低,相比于未经热处理红宝石分别高了约1000×10^(-6)以及低了约100×10^(-6);未经热处理红宝石可检测到硬水铝石的吸收峰以及结构水和游离水的吸收峰,而热处理红宝石由于受高温的破坏,均检测不到这些特征吸收峰;热处理红宝石位于694 nm附近的荧光峰整体上比未经热处理红宝石更强且尖锐。
A batch of unheated and heated rubies from Myanmar were obtained from a gemstone processor in Thailand.The gemmological characteristics,chemical composition characteristics,infrared spectrum characteristics and UV-Vis absorption spectrum characteristics were tested and analyzed,so as to obtain the characteristics of the rubies after heat treatment and distinguish them from the unheated rubies from Myanmar.The test results showed that a large number of secondary melt inclusions were found in the heated rubies,while only mineral crystal inclusions and fluid inclusions were observed in the unheated rubies.In terms of chemical composition characteristics,the average content of Ti element in heated rubies is about 1000 ppm higher than that in the unheated rubies,and the average content of Fe element in heated rubies is about 100 ppm lower than that in the unheated rubies.Absorption peaks of daspore,structural water and free water can be detected in unheated rubies,but these characteristic absorption peaks can not be detected in heated rubies due to the damage of high temperature.Compared with unheated rubies,the fluorescence peak of heated rubies near 694 nm is stronger and sharper.
作者
宋秋容
沈锡田
SONG Qiurong;Andy Hsitien Shen(Gemmological Institute,China University of Geosciences,Wuhan 430074,China)
出处
《宝石和宝石学杂志》
CAS
2021年第3期7-18,共12页
Journal of Gems & Gemmology
基金
中国地质大学(武汉)珠宝检测技术创新中心开放基金(GICTXM-S201814),文章编号GICTWZ-2021013。
关键词
缅甸
红宝石
热处理
化学成分
红外光谱
紫外-可见吸收光谱
Myanmar
ruby
heat treatment
chemical composition
infrared spectrum
UV-Vis absorption spectrum
