第34卷，第2期 2014年2月
光谱学与光谱分析 Spectroscopy and Spectral Analysis
Vol.34,No.2-pp426-430 February2014
Combined Use of Infrared and Raman Spectra in the Characterization of
Orthoclase under Various Hydrostatic Pressures LIURui,WANGZhi-hua,XUQiang,YUNa,CAOMiao-cong College of Prospecting and Surveying , Changchun Institute of Technology , Changchun 130021, Chins
Abstract Colorless and pink orthoclase from Balikun granite body , East Zhunger in Xinjiang + served as the samples for the research on hydrostatic pressure experiment . The insitu hydrostatic pressure test for ortho-clases was conducted at the room temperature and pressures from 100 to 600 MPa using cubic zirconia anvil cell , with quartz as pressure gauge . The water located in the orthoclases for the conditions of different hydro -static pressures was characterized through the methods of Fourier transform infrared (FTIR ) and Raman spec-tra . The results showed that there was a linear correlation between the shifting of Raman bands and hydrostat -ic pressure applied to the feldspar , All of vibration peaks of M—O structural groups in orthoclases ,the bending ens s ee dre e nsOs o ed the higher frequency regularly + the drift distance is 2 , 2. 19 and less than 2 cm1 respectively . The spectra of FTIR suggested that there was more water in colorless orthoclases than the pink one under certain conditions of hydrostatic pressure . The intensity and integral area centered at 3 420 cm in FTIR spectra increased with the rising of hydrostatic pressure . The integral area for colorless and pink feldspar in FTIR spectra rose from 120 , 1 383 cm1 under normal pressure to 1 570 , 2 001 cm at 600 MPa respectively . The experimental re-sults might indicate that the water in the earth crust could enter the orthoclases in certain condition of the aque -ous confining pressure.
Keywords Orthoclases ; Anvil cell ; Water ; Fourier transform infrared spectra ; Raman spectra
中图分类号：0657.3
Introduction
文献标识码：A
DOI : 10. 3964 /j issn. 1000-0593(2014 )02-0426-05
important theoretical and practical significances for the geo logical metallogenic theories , transformation of mineral phase and mineral physics etc .5-] . Modern research methods have
A great interest is showed in the detection of trace a-mounts of water present in structures of the nominally anhy -drous minerals, which occur in the forms of H+, OH-, OHt or H: O in recent years(1.2]. Orthoclase is one of the most abundant minerals in the crust . The presence of trace a-mounts of water in orthoclase has considerable effects on its chemical and physical properties , diffusion of elements , weathering and alteration (s.] . The water in the feldspar could become one of its chemical components . The studying of wa-ter in orthoclase in the conditions of high-pressure provides
Received : 2013-04-09 , accepted : 2013-07-08
provided a possibility for the exploration of trace amounts of water in normally anhydrous minerals with the help of ad-vanced mineralogical , chemical and physical techniques . The method with a cubic zirconia used as the anvil cell and quartz as a gauge was applied to the experiment at a pressure lower than 2. O GPa. The experiment has the features of accurate pressure calibration , low cost and the data reliable .
Single crystal Fourier transform infrared (FTIR ) adsorp-tion spectra provide an experimental approach to ascertaining the presence of various kinds of water in the nominally anhy-
Fundation Pojeet : The Natural Science Foundation of China (41172043)
Biography : LIU Rui , (1963—), Professor , Changchun Institute of Technology , Engaging in Research on Mineralogy and Environmental Min
eral Materials
e-mail : gglr984@ sohu -com