高压高温处理条件下钻石中晶格缺陷的演化与呈色

亓利剑; 袁心强; 田亮光; 苑执中

高压高温处理条件下钻石中晶格缺陷的演化与呈色

1. 中国地质大学珠宝学院, 湖北武汉, 430074;
2. 山东省珠宝检验站, 山东济南, 250014;
3. 索斯达国际宝石公司, 台湾台北

基金项目:

国家自然科学基金资助项目(49772096)

详细信息

作者简介:
亓利剑，男，1956年生，副教授，地球化学专业，主要从事宝石学研究与教学工作。

中图分类号: P619.28
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- 收稿日期: 2001-07-17

Evolution And Colouration of Lattice Defects in Diamonds at High Pressure and High Temperature

1. Gemmological Institute, China University of Geosciences, Wuhan, 430074, China;
2. Jewelry Inspection Station of Shandong Province, Jinan, 250014, China;
3. Jewelry International Inc., Taiwan

摘要

摘要: 实验室的高压高温条件为褐黄色钻石中的晶格缺陷提供了足够的均向压力和势能,有助于Ⅰa型、Ⅱa型褐黄色钻石中的位错发生攀移、重组、湮灭、增殖和滑移,最终转变成无色、黄绿色及蓝色钻石。研究表明,由两组细密、微波状、明暗相间、断续排列且边界渐变的变形带组成的似格状应力图案属修复型滑移面(线)系,代表了Ⅱa型钻石中位错的攀移、重组和湮灭;沿钻石四方生长环带方向相间有序排列的位错壁和边界突变似聚片双晶的强变形带属增强型滑移面(线)系,代表了Ⅰa型钻石中位错的增殖和运动。3760 cm^-1(低温状态下为3738cm^-1)拉曼谱峰与2 0 87,796cm^-1拉曼谱带一道归属钻石中晶格缺陷心所致。证实晶格缺陷的形成与演化共同制约了钻石的呈色和发光。
- 褐色钻石 /
- HPHT改色处理 /
- 晶格缺陷 /
- 呈色
Abstract: HPHT in the laboratory provides the lattice defects in a brown yellow diamond with sufficient homogeneously oriented pressure and potential energy that are favorable for the dislocation in types Ⅰa and Ⅱa brown yellow diamonds. Such changes in dislocation finally result in colour transformation from the brown yellow to the colourless, yellow green and blue. The present research shows that the pseudo grid like stress pattern, composed of two groups of discontinuously arranged deformed bands which are fine and dense and rippled, and have alternated brightness and darkness and graded boundary lines, is included in a reconditioned gliding surface (line) system, representing the displacement, reorganization, and disintegration of the dislocation in type Ⅱa diamond. The dislocation walls interphased and regularly arranged in the direction of the tetragonal growth rings of the diamond and the strong deformation bands whose boundaries experienced sudden changes like repeated twin crystals, are both included in the enhanced gliding surface (line) system, representing the multiplication and movement of the dislocation in type Ⅰa diamond.The Raman spectrum peak at 3760cm^-1 (or at 3738cm^-1 at low temperature) and the Raman spectrum bands at 2087cm^-1 and 796cm^-1 result from the crystal lattice defects in types Ⅰa and Ⅱa diamonds. The formation and evolution of the lattice defects are proved to restrain the colouring and luminescence of the diamond.
- brown diamond /
- HPHT coloured treatment /
- lattice defects /
- colouration

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参考文献(7)

[1]	池际尚, 路凤香, 刘永顺, 等.中国原生金刚石成矿地质条件研究[M].武汉:中国地质大学出版社, 1996.3-52
[2]	彭明生, 林冰, 彭卓伦.金刚石呈色机制初探[J].矿物岩石地球化学通报, 1999, 18(4):395-397
[3]	Weerdt F D, Royen J V.Investigation of seven diamonds, HPHT-treated byNova diamond[J].TheJournal of Gemmology, 2000, 27(4):201-208
[4]	ChristopherP S, GeorgeB, JohannP.GE POL diamonds:before and after[J].Gems & Gemology, 2000, 36(3):192-215
[5]	MattH, ThomasM.Identification of HPHT-treated yellow togreen diam onds[J].Gems & Gemology, 2000, 36(2):128-137
[6]	Schmetzer K.Clues to the process used by general electric to enhance theGE POL diamonds[J].Gems & Gemology, 1999, 35(4):189-190
[7]	王子溯.高温下YAI03和YAI305的可塑性[C].第30届国际地质大会论文集.北京:地质出版社, 1999.133-139

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高压高温处理条件下钻石中晶格缺陷的演化与呈色

作者简介: 亓利剑，男，1956年生，副教授，地球化学专业，主要从事宝石学研究与教学工作。

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出版历程

Evolution And Colouration of Lattice Defects in Diamonds at High Pressure and High Temperature

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出版历程

目录

作者简介:
亓利剑，男，1956年生，副教授，地球化学专业，主要从事宝石学研究与教学工作。