蛇纹石猫眼的红外光谱及热相变机制研究

无机材料学报

蛇纹石猫眼的红外光谱及热相变机制研究

卢保奇¹; 夏义本¹; 亓利剑²

1. 上海大学材料科学与工程学院, 上海 200072; 2. 中国地质大学珠宝学院, 武汉 430074

收稿日期:2004-02-26 修回日期:2004-03-24 出版日期:2005-03-20 网络出版日期:2005-03-20

Infrared Absorption Spectra of Serpentine Cat s Eye and the Mechanism of It s Thermotransformation

LU Bao-Qi¹; XIA Yi-Ben¹; QI Li-Jian²

1.School of Materials and Engineering; Shanghai University; Shanghai 200072; China; 2.China' s Geological University; Wuhan 430074; China

Received:2004-02-26 Revised:2004-03-24 Published:2005-03-20 Online:2005-03-20

摘要/Abstract

摘要： 以四川蛇纹石猫眼为研究对象,采用差热分析(DTA)、红外吸收光谱(IR)和X射线粉晶衍射(XRD)方法,在变温条件下对蛇纹石猫眼及其热相变的产物和机制进行了研究. 结果表明:加热到700℃时,蛇纹石猫眼完全脱羟,同时部分转变为晶质镁橄榄石和非晶质顽火辉石.800℃时,晶质顽火辉石生成.800-1100℃时,晶质镁橄榄石和晶质顽火辉石的量逐渐增加. 1100℃时顽火辉石的结晶有序度增加.加热过程中未出现SiO₂相.并提出了纤蛇纹石猫眼的热相变机制.

关键词: 蛇纹石猫眼, 镁橄榄石, 顽火辉石, 热相变

Abstract: DTA, IR and XRD were used to study the characteristics of serpentine cat’s eye from Sichuan province at different temperatures.
Also, the thermotransformation products and mechanism of Sichuan serpentine cat’s eye were discussed. Finally, the mechanism of thermotransformation of
chrysotile cat’s eye was proposed. The results show that when heated up to 700℃, the serpentine cat’s eye completely dehydrates and partly transforms into
crystalline forsterite and non-crystalline enstatite. At 800℃, crystalline enstatite is formed. Heated above 800 to 1100℃, the amount of crystalline
forsterite and enstatite increases gradually. Up to 1100℃, the degree of crystalline order of enstatite is improved. During thermotransformation,
no SiO₂ phase is formed.

Key words: serpentine cat s eye, forsterite, enstatite, thermotransformation

中图分类号:

P619

卢保奇,夏义本,亓利剑. 蛇纹石猫眼的红外光谱及热相变机制研究[J]. 无机材料学报.

LU Bao-Qi,XIA Yi-Ben,QI Li-Jian. Infrared Absorption Spectra of Serpentine Cat s Eye and the Mechanism of It s Thermotransformation[J]. Journal of Inorganic Materials.