Title :
In situ high temperature X-ray diffraction research for Kunlun green jade
Author :
Li, Yongde ; Hu, Chengxi ; Liu, Yuan ; Hu, Zhongshan ; Zhang, Zhiliang ; Yang, Weifeng
Author_Institution :
Dept. of Phys., Qinghai Normal Univ., Xining, China
Abstract :
The jasper from Kunlun Mountain in Qinghai is analyzed with the method of situ high temperature X-ray diffraction (HT-XRD) analysis, which gives the result that the chemical formula of its main composition is Ca2Mg5[Si4O11]2(OH)2 at room temperature, proving to be Tremolite, still mixed with a spot of Dolomite and Talc. By analyzing the diffraction data, it is found that at 1150°C for the jasper´s main composition phase transition occurs. This phase transition is that the Ca-Mg pyroxene forms because of the Tremolite being affected by products of the thermal decomposition of Dolomite and Talc.
Keywords :
X-ray diffraction; calcium compounds; chemical analysis; magnesium compounds; pyrolysis; solid-state phase transformations; Ca2Mg5[Si4O11]2(OH)2; Kunlun Green Jade; Kunlun Mountain; X-ray diffraction; composition phase transition; dolomite; in situ high temperature; pyroxene; talc; temperature 1150 degC; temperature 293 K to 298 K; thermal decomposition; tremolite; Diffraction; Heating; Image color analysis; Materials; Thermal decomposition; X-ray diffraction; X-ray scattering; Dolomite; Hot phase change; In situ high temperature X-ray diffraction; Talc; Tremolite;
Conference_Titel :
Multimedia Technology (ICMT), 2011 International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-61284-771-9
DOI :
10.1109/ICMT.2011.6002532
