PRILIMINARY STUDY ON THE MINERALOGICAL CHARACTERS OF LAVENDER JADEITE JADE
-
摘要: 通过对九个包括几种色调的紫色翡翠样品进行常规的标本描述、编光显微镜下薄片鉴定，结合红外光谱和X光衍射分析，轻系统地研究了紫色翡翠的矿物学特征，并根据能增分析结果，对紫色翡翠的致色机理作了初步探讨。结果表明：紫色翡翠的比重相对轻小；其主要矿物成分为硬玉，次要矿物为钟长石和透闪石，少量的霓辉石和霓石；硬玉可分为三个世代，紫色硬玉的晶形较好，多呈自形粒状交品结构，主要属于第二和第三世代，即形成时间相对较晚；紫色翡翠的颜色主要由致色元素Fe引起，同时，V，Ni，Mn等致色元素对形成紫色的不同色调也起一定的作用。Abstract: The mineralogical characters and colouring elements of lavender jadeite jade are summarized according to the studies under polarized microscope，infrared spectrum analysis，X-ray diffraction analysis and energy dispersive X-ray spectrum analysis of 9 samples which includes two samples of jadeite jade B. The results show that the specific gravities of most samples are less than 3.33. The main mineral components are jadeite (> 90%), albite(3%~8%), tremolite (2%~5%) and a few aeginine-augite and aeginine. The jadeites in the samples can be divided into three epoches. Most of lavender jadeites with relatively good ctystal forms belong to the second epoch and the third epoch. The lavender jadeite jade is coloured mainly by Fe, whereas some other colouring elements such as V，Ni, Mn are responsible for various tinges of lavender jadeite jade.
-
Keywords:
- lavender jadeite jade /
- mineralogical characters /
- colouring element
-
-
[1] 亓利剑, 郑曙, 谭振宇.缅甸辉石玉常见种属及宝石学特征. 珠宝科技, 1998. 10(1): 51~56 [2] 欧阳秋眉. 翡翠的矿物组成.宝石和宝石学杂志, 1999. 1(1): 18~23 [3] 邹天人, 於晓晋,夏凤荣等.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 [4] 奥岩, 陈进缅甸各种颜色翡翠化学成分特征.珠宝科技, 1997. 9(4): 37~40 [5] 杨尽.缅甸翡翠矿石物质组分及评价的研究国外非金属矿与宝石, 1990, (6): 46~48 [6] 尹宗烈.试论翡翠的矿物学、岩石学与宝石学之间的关系.珠宝, 1989, (1): 16~19 [7] 奥岩. 翡翠的结构、矿物成分与其物理性质的关系.珠宝科技, 1998, 10(2): 43~55 [8] 石桂华。张如玉.硬玉(jadeite)及其颜色的成因研究宝石. 1997, (1): 32~36 [9] 林传易, 朱和宝, 王筑明等硬玉和透辉石的光吸收谱和颜色. 矿物学报。1998, 8(3): 193~199 [10] 欧阳秋眉, 李汉声.黑色翡翠的成色机理.中国宝石, 1998(4): 63~65 [11] 摩傣. 翡翠的色彩宝石学.珠宝, 1990. (2): 15~17 [12] Rassman G R. Lavender jade——the optical spectrum of Fe3+ and Fe2+→Fe3+ intervalence charge transfer in jadeite from Burma. American Mineralogist. 1974. 59: 868~870
[13] Harder H, Gottingan. Trace element as colouring agents in jadeitcs. J. Gemm.. 1995, 24(7): 508~511
[14] 中国科学院贵阳地球化学研究所. 矿物X射线粉晶鉴定手册.北京:科学出版社, 1978. 254~255
计量
- 文章访问数: 31
- HTML全文浏览量: 0
- PDF下载量: 9
下载:
