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High-pressure ruby and diamond fluorescence - Observations at 0.21 to 0.55 terapascal (1986)

Mao, H. K. ; Xu, J. A. ; Bell, P. M.

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Publication Date: 2019-07-12

Description: A diamond-anvil, high-pressure apparatus was used to extend the upper pressure limit of static laboratory experiments. Shifts of the R1 strong fluorescent line of ruby were observed that correspond to static pressures of 0.21 to 0.55 terapascal (2.1 to 5.5 megabars) at 25 C. Sensitive spectroscopic techniques in the pressure range 0.15 to 0.28 terapascal were used to observe ruby and diamond fluorescence separately; these two fluorescent emissions overlap strongly at high pressures. At pressures greater than approximately 0.28 terapascal, the diamond fluorescence diminished and the ruby fluorescence reappeared strongly. Pressure was determined by extrapolation of the calibrated shift of the ruby R1 line.

Keywords: ENGINEERING (GENERAL)

Type: Science (ISSN 0036-8075); 232; 1404-140

Format: text

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