摘要
在温度 35～ 35 0℃、压力 1 7～ 2 7GPa下用水热金刚石压腔进行了水的红外光谱测量和研究。研究结果表明 :在低于 2 1GPa时水的伸缩振动吸收峰的频率及半高宽分别随着压力增大而增高和减小 ,且在2 1GPa的压力存在着不连续 ,即随着压力的增大和在 2 1GPa压力下水的吸收峰具有明显和不连续的变化。这表明水在高压下的性质是不连续的 ,并与高压下纯水和NaCl溶液的电导率存在不连续的现象一致 ,也与含水矿物叶蜡石和蛇纹石在 2 0GPa处的脱水温度与压力的关系发生逆转现象一致。水的这种不连续性将对岩石圈中的矿物或岩石起重要作用 ,需要进行进一步的研究。
The infrared spectra measurement for water has been conducted and investigated at the temperatures of 35-350degreesC 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.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2004年第4期411-413,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金 (批准号 :1 0 2 990 4 0
40 1 730 1 9)资助项目
