Abstract:Take the nominally anhydrous jadeite mineral in jadeitite as research objects,useing FTIR with normal temperature and heterotherm,to analyse representation of structure water and thermal variation behavior of jadeite. The result shows: Representation of FTIR of M—OH stretching vibration concentrates mainly on four areas, 3 700~3 600,3 570~3 520,3 500~3 300 and 3 230~3 140 cm-1,but with different characterization in different jadeite. In the process of varying temperature,the relative absorption intensity of absorption band in 500 ℃ decreased obviously,and the content of structure water gradually decreased,further characterization of the “water” in jadeite minerals is in the form of structure water. But the absorption spectrum caused by M—OH stretching vibration,the content of structure water and fingerprint spectra near 850 ℃ changesobviously,indicating that the temperature of jadeite mineral composition has mutated. The thermal variation behavior of “water” in jadeite mineral provides some evidence in order to further understand the occurrence state and binding mode of water and diagenetic mechanism.
[1] SHENG Ying-ming, GONG Bing, LI Wan-cai(盛英明,龚 冰,李万财). Science China:Earth Sciences(中国科学:地球科学),2016,46(4):443.
[2] FAN Xiao-yu, WU Xiu-ling, MENG Da-wei(樊孝玉,吴秀玲,孟大维). Journal of China University of Geosciences·Earth Science(中国地质大学学报·地球科学),2006,26(2): 24.
[3] FAN Xiao-yu, WU Xiu-ling, MENG Da-wei(樊孝玉,吴秀玲,孟大维). Journal of China University of Geosciences·Earth Science(中国地质大学学报·地球科学),2007,32(2):167.
[4] WANG Rong, ZHANG Bao-min(王 蓉,张保民). Science China:Earth Sciences(中国科学:地球科学),2011, 41(6):832.
[5] Shi G H, Sto Ckhert, Cui W Y. Mineral,2005,69(6):1059.
[6] XING Ying-ying(邢莹莹). Acta Petrologica et Mineralogica(岩石矿物学杂志),2015, 34(1):87.