1. 北京大学造山带与地壳演化教育部重点实验室，北京大学地质学系，北京 100871 2. Department of Earth Science, University of Cambridge, Cambridge, CB2 3EQ, UK
Evidence of Discontinuous Property of Water: Study of Infrared Spectra at High Temperature and High Pressure
ZHENG Hai-fei1，SUN Qiang1，Andy Shen2，Zhang Ming2
1. Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, Department of Geology, Peking University, Beijing 100871, China 2. Department of Earth Science, University of Cambridge, Cambridge, CB2 3EQ, UK
Abstract：The infrared spectra measurement for water has been conducted and investigated at the temperatures of 35-350℃ and the pressures of 1.7-2.7 GPa by using Hydrothermal Diamond Anvil Cell(HDAC). The result shows that the peak frequency and the full width at half height of the stretching vibration of water increases and decreases respectively with increasing pressure. It also shows that there is a discontinuousness at the pressure of 2.1 GPa, that is, the frequency and the full width at half height of the peak have an obvious and discontinuous change from the pressures below and above 2.1 GPa, indicating that the property of water is discontinuous at high pressure. This is consistent with the discontinuous property of electrical conductivity from the previous studies for pure water and NaCl aqueous solution. Also it is consistent with the relationship between the temperature and the pressure of the dehydration of the bearing water minerals at about 2.0 GPa. It is expected that such a discontinuous property of water will play an important role on the minerals and rocks in the deep lithosphere and further detailed study needs to be done for them.
Key words：Water;HDAC;High temperature and high pressure;Discontinuous property
郑海飞1，孙 樯1，Andy Shen2，Zhang Ming2 . 水性质的不连续证据：高温高压下水的红外光谱研究[J]. 光谱学与光谱分析, 2004, 24(04): 411-413.
ZHENG Hai-fei1，SUN Qiang1，Andy Shen2，Zhang Ming2 . Evidence of Discontinuous Property of Water: Study of Infrared Spectra at High Temperature and High Pressure . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(04): 411-413.
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