About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Emergent Materials under Extremes and Decisive In Situ Characterizations
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Presentation Title |
Determination of P-V Equation of State of a Natural Clinoptilolite Using High Pressure Synchrotron X-ray Diffraction |
Author(s) |
Andrew Charles Strzelecki, Stella Chariton, Cody B. Cockerham, Vitali Prakapenka, Bethany A. Chidester, Di Wu, Chris R. Bradley, Garrett Euler, Xiaofeng Guo, Hakim Boukhalfa, Hongwu Xu |
On-Site Speaker (Planned) |
Andrew Charles Strzelecki |
Abstract Scope |
The compression behavior of a natural HEU type zeolite, clinoptilolite, was investigated in the pressure range of 0–15 GPa using in-situ synchrotron powder XRD with a diamond-anvil cell. Clinoptilolite underwent pressure induced amorphization when the pressure exceeded 9.04 GPa and was deemed fully amorphous at 14.65 GPa. Rietveld analyses of the XRD data allowed determination of its unit-cell parameters as a function of pressure. The resulting fit to the second order Birch-Murnaghan equation of state for the clinoptilolite yielded a V0 of 2094 ± 8 ų and a K0 of 34.4 ± 1.4 GPa. The zero-pressure compressibilites of its a, b, and c axes are 10.6 (± 0.8) × 10–3 GPa–1, 5.3 (± 0.7) × 10–3 GPa–1, and 17.1 (± 1.8) × 10–3 GPa–1, respectively. The derived bulk moduli and linear compressibilites indicate that the compression behavior of clinoptilolite is highly anisotropic. |