四川石棉蛇纹石猫眼热相变的Raman光谱和XRD研究

四川石棉蛇纹石猫眼热相变的Raman光谱和XRD研究

卢保奇1, 亓利剑2, 夏义本1, 王赐银3

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; 3.南京大学,地球科学系,南京, 210093

收稿日期:2005-06-20 修回日期:2005-06-20 出版日期:2005-06-20 发布日期:2005-06-20

Study on the Raman Spectra and XRD for Thermotransformation of Serpentine Cat’s Eye from Shimian,Sichuan Province,Southwest China

LU Bao-qi1, QI Li-jian2, XIA Yi-ben1, WANG Ci-yin3

1. School of Materials and Engineering, Shanghai University, Shanghai 200072, China; 2. Jewerally Institute, China University of Geosciences, Wuhan 430074, China; 3. Department of Earth Science, Nanjing University, Nanjing 210093, China

Received:2005-06-20 Revised:2005-06-20 Online:2005-06-20 Published:2005-06-20

摘要/Abstract

摘要： 采用Raman光谱和X射线粉晶衍射(XRD)方法对四川蛇纹石猫眼的热相变过程和产物进行的研究表明,蛇纹石猫眼热相变的最终产物为镁橄榄石和顽火辉石。加热到500℃,蛇纹石猫眼的结构稳定；700℃,时,镁橄榄石的拉曼特征峰824cm^-1和854cm^-1出现,同时出现非晶质顽火辉石686cm^-1和341cm^-1附近的包络峰；800～900℃时,镁橄榄石的含量和结晶程度增强。晶质顽火辉石相出现,但强度较弱。1000℃时,镁橄榄石的含量明显降低。1100℃时,顽火辉石的含量和结晶程度显著增加。

Abstract: Abstract：Raman spectra and X-ray power diffraction(XRD)were used to study the process and products of thermotransformation of serpentine cat’s eye，which was firstly discovered at the asbestos deposit of Shimian town，Sichuan Province，Southwest China and could display excellent cat’s eye effect if polished properly．The results show that the final products of thermotransformation of the Sichuan serpentine cat’s eye are crystalline forsterite and crystalline enstatite．Heated up to 500℃ for two hours, the Raman spectrum pattern of Sichuan serpentine cat’s eye remains intact，indicating its stable internal structure and good resistance to relatively high heat；Up to 700℃ ，the characteristic Raman bands 824 and 854 cm-1 are clearly observed，indicating the appearance of forsterite，along with the appearance of the overlapped bands 686 and 340 cm-1of noncrystalline enstatite; At 800～900℃, the crystallization of forsterite increases，meanwhile，crystalline enstatite begins to appear．When heated to 1000℃ ，the amount of forsterite decreases apparently．Up to 1000℃, the amount of enstatite increases rapidly．

卢保奇, 亓利剑, 夏义本, 王赐银. 四川石棉蛇纹石猫眼热相变的Raman光谱和XRD研究[J]. J4.

LU Bao-qi1, QI Li-jian2, XIA Yi-ben1, WANG Ci-yin3. Study on the Raman Spectra and XRD for Thermotransformation of Serpentine Cat’s Eye from Shimian,Sichuan Province,Southwest China[J]. J4.