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摘要: 利用石英的拉曼谱峰与温度和压力的关系,检验了在金刚石压腔中用方解石拉曼谱峰确定体系压力的可行性,并初步确定了在常温下方解石的拉曼谱峰与压力的关系。实验研究结果表明:在实验的压力范围内方解石稳定,且其1 085 cm-1 谱峰约为石英464 cm-1谱峰的3倍强度,因此非常适合作为热液金刚石压腔的压力标定物。在温度26 ℃、压力0.1~800 MPa条件下,方解石的拉曼谱峰(1 085 cm-1)随着压力的增加,呈线形增大,其关系式为:p(MPa)=192(p-1 085)-21.8,1 085 cm-1p1 090 cm-1。Abstract: This paper investigates the reliability of calcite as a pressure gauge for the hydrothermal diamond anvil cell (HDAC) by the experiment at the pressure of 0.1~800 MPa and the temperature of 26 ℃, and defines the relation between the pressure and the Raman peak position of calcite in ambient temperature. The result shows that calcite is stable at the experimental pressure, and the intensity of its 1 085 cm-1 Raman peak is two times greater than that of the 464 cm-1 Raman peak of quartz, calcite is reliable as a pressure gauge for the hydrothermal diamond anvil cell. The relation between the system pressure and peak position of calcite (1 085 cm-1) is given as following: p(MPa)=192(p-1 085)-21.8, 1 085 cm-1p1 090 cm-1.
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Key words:
- high pressure /
- pressure gauge /
- calcite /
- Raman spectra /
- diamond anvil cell
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Shen Z X. High Pressure Raman Study of Non-Linear Optical Crystals [J]. Chinese Journal of High Pressure Physics, 2000, 14(2): 92-98. 申泽骧. 非线性光学晶体的高压拉曼散射研究 [J]. 高压物理学报, 2000, 14(2): 92-98. Xiao W S, Weng K N, L G C, et al. Experiments on Reaction of Polyethylene and Water under High Pressure and High Temperature [J]. Chinese Journal of High Pressure Physics, 2001, 15(3): 169-177. (in Chinese) 肖万生, 翁克难, 律广才, 等. 聚乙烯与水反应的高温高压实验及热力学探讨 [J]. 高压物理学报, 2001, 15(3): 169-177. Bassett W A, Shen A H. A New Diamond Anvil Cell for Hydrothermal Studies to 2. 5 GPa and from -190 to 1200 ℃ [J]. Rev Sci Instrum, 1993, 64: 2340-2345. Schmidt C, Ziemann M A. In-Situ Raman Spectroscopy of Quartz: A Pressure Sensor for Hydrothermal Diamond-Anvil Cell Experiments at Elevated Temperatures [J]. American Mineralogist, 2000, 85(11-12): 1725-1734. Gillet P H, Malezieux J M, Dhamelincourt M C. Microraman Multichannel Spectroscopy up to 205 GPa Using a Sapphire-Anvil Cell: Experimental Set-up and Some Applications [J]. Bull Mineral, 1988, 111: 1-15. Liu L G, Mernagh T P. Phase Transitions and Raman Spectra of Calcite at High Pressures and Room Temperatures [J]. Am Mineral, 1990, 41: 745-756. Gillet P H, Biellmann C L, Reynard B R, et al. Raman Spectroscopic Studies of Carbonates Part 1: High-Pressure and High-Temperature Behaviour of Calcate, Mganesite, Dolomite and Aragonite [J]. Phys Chem Minerals, 1993, 20: 1-18.
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