云南麻栗坡祖母绿的矿物学特征研究  

Mineralogical characteristics of emerald from Malipo, Yunnan Province

作　　者：黄文清[1,2] 倪培[2] 水汀[3] 杨佩[1] 

机构地区：[1]国家金银制品质量监督检验中心南京,江苏南京210028 [2]南京大学地球科学与工程学院,江苏南京210093 [3]国土资源部南京地质矿产研究所,江苏南京210016

出　　处：《岩石矿物学杂志》2015年第1期103-109,共7页Acta Petrologica et Mineralogica

摘　　要：利用电子探针、X射线衍射等技术对云南麻栗坡祖母绿进行了矿物学研究,结果表明祖母绿含碱金属和铁镁质两组主要微量元素;V2O3含量明显高于Cr2O3,表明主要是Ⅴ致色;折射率No=1.584～1.586,Ne=1.576～1.579,相对密度S.G=2.70±0.01;类质同像替代以八面体替代为主.麻栗坡祖母绿的矿物学特征可用于作为产地鉴定的依据.Emerald from Malipo in Yunnan Province was studied in this paper by using electron probe microana- lyzer （EPMA）, XRD and other technologies and, on such a basis, the characteristic features of Malipo emerald have been established： it contains two sets of trace elements （femic and alkali）; the content of V203 is signifi- cantly higher than that of Cr2O3, which shows that V is the main element causing color; the refractive indices are No = 1. 584～1. 586, Ne = 1. 576～ 1. 579, and the specific gravity is 2.70±0.01 ; the isomorphous substi- tutions of Malipo emerald are of “octahedral-type” used to determine the origin of the emerald. The mineralogical characteristics of Malipo emerald can be used to determine the origin of the emerald.

关 键 词：电子探针 微量元素 云南麻栗坡 祖母绿 

分 类 号：P578.969[天文地球—矿物学]