A PRELIMINARY STUDY ON THE NON-DESTRUCTIVE IDENTIFICATION OF CLINOPYROXENE JADES FROM MYANMAR
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摘要: 在缅甸产的各种玉石中，以单斜辉石类矿物为主要组成的玉石占有较大的比重，主要包括分别以硬玉矿物、绿辉石矿物、钠铬辉石矿物为主组成的硬玉玉、绿辉石玉、钠铬辉石玉。目前是否将绿辉石玉、纳铬辉石玉归类于翡翠尚存在争议。着重讨论了对这三种玉石的无损鉴定方法。实验表明，X荧光能谱（EDXRF）化学成分定量分析结合红外显微镜镜面反射光谱分析，对矿物成分较为单一、分布较为均匀的玉石是行之有效的鉴定方法。理论上，根据成分及红外光谱，对硬玉-铬硬玉-纳铬辉石和硬玉-绿辉石质硬玉-绿辉石两个类质同象系列，讨论了化学成分与红外光谱的关系。Abstract: Among various types of Myanmar jades, the most important are the jades mainly consisting of clinopyroxene minerals. Those jades include jadeite-jade, omphacite-jade and kosmochlor-jade. Now, different views on whether omphacite jade and kosmochlor-jade should belong to jadeite-jade are held out. The paper mainly discusses the non-des tructive identification methods to separate jadeite-jade from omphacite-jade and kosmochlor-jade. The experimental results show that the quantitative analysis of chemical composition by EDXRF combining the reflectance FTIR can determine jade with relative: simplicity and homogeneity in mineralogical composition effectively. On theory, according to the data of EDXRF and the spectra of FTIR, the relations between EDXRF and FTIR in two series of jadeite-astridite-kosmochlor and jadeite-omphacitic jadeite-omphacite are discussed.
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Keywords:
- jadeite-jade /
- type /
- identification /
- EDXRF /
- FTIR
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[1] Hanni H A. Maw-Sit-Sit (kosmocblore-jade): a metamorphic rock with a complex composition from Myanmar (Burma). Abstracts of 26th International Gemmological Conference.1997
[2] Htein W, Naing A M. Studies on kosmochlor jadeite and associated minerals in jade of Myanmar. Journal of Gemmology, 1995.24(5): 315~320
[3] 欧阳秋眉.翡翠的矿物组成宝石和宝石学杂志，1999，1(1): 18~24 [4] 邹天人，於晓晋,夏凤荣，陈伟十.翡翠的单斜辉石类矿物研究.宝石和宝石学杂志，1999, 1(1); 27~32 [5] 崔文元，王时麒，杨富绪，王长秋，施光海缅甸翡翠(辉石玉)的分类、中国宝石. 1998, 7(3); 80~86 [6] 亓利剑,郑曙，裴景成.翡翠中钠铬辉石后成合晶与成分变异环带机理.宝石和宝石学杂志，1999, 1(1): 13~17 [7] 高岩，张蓓莉.红外光谱技术在宝石学中的应用.中国宝石，1998，7(1): 113~115
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