A Paris-Edinburgh Cell for High-Pressure and High-Temperature Structure Studies on Silicate Liquids Using Monochromatic Synchrotron Radiation

• Published in: Minerals (Basel) Vol. 9; no. 11; p. 715
• Main Authors: Yu, Tony, Prescher, Clemens, Ryu, Young Jay, Shi, Feng, Greenberg, Eran, Prakapenka, Vitali, Eng, Peter, Stubbs, Joanne, Kono, Yoshio, Shen, Guoyin, Watson, Heather, Rivers, Mark L., Sutton, Stephen R., Wang, Yanbin
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.11.2019; MDPI
• Subjects: Anvils; Collimators; Data collection; Energy; Experiments; High pressure; High temperature; Liquids; multi-channel collimator; non-crystalline materials; Paris-Edinburgh cell; Pressure; Radiation; Radiation sources; Silicates; Synchrotron radiation; Synchrotrons; Temperature; X rays; X-ray scattering; United States > US
• ISSN: 2075-163X; 2075-163X
• DOI: 10.3390/min9110715

A Paris-Edinburgh press combined with a multi-channel collimator assembly has been commissioned at the GeoSoilEnviro Center for Advanced Radiation Sources (GSECARS) beamline for monochromatic X-ray scattering, with an emphasis on studying low-Z liquids, especially silicate liquids at high pressure. The Paris-Edinburgh press is mounted on a general-purpose diffractometer, with a pixel array detector mounted on the detector arm. The incident monochromatic undulator beam with energies up to 60 keV is focused both horizontally and vertically to a beam size about 30 × 30 µm. With this setup, background scattering from the surrounding pressure media is completely removed at 2θ angles above 10° for samples larger than 1.05 mm in diameter. Thirty minutes is typically sufficient to collect robust X-ray scattering signals from a 1.6 mm diameter amorphous silicate sample. Cell assemblies for the standard Paris-Edinburgh anvils have been developed and pressures and temperatures up to 7 GPa and 2300 K, respectively, have been maintained steadily over hours. We have also developed a cupped-toroidal Drickamer anvil to further increase pressure and temperature capabilities. The cupped-toroidal Drickamer anvil combines features of a modified Drickamer anvil and the traditional Paris-Edinburgh anvil. Pressures up to 12 GPa have been generated at temperatures up to 2100 K.