Thorium: Phase transformations and equation of state to 300 GPa |
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| Authors: | Yogesh K. Vohra Jagannadham Akella |
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| Affiliation: | 1. Materials Science and Engineering , Cornell University , Ithaca, NY, 14853, U.S.A.;2. Lawrence Livermore National Laboratory , University of California , Livermore, CA, 94550, U.S.A. |
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| Abstract: | Abstract Equation of state and phase transformations of thorium metal have been investigated to 300 GPa at 300 K in a diamond anvil cell using energy dispersive X-ray diffraction employing synchrotron source. Phase transformations in the 70–100 GPa range indicative of 5f-electron bonding are observed and thorium metal is isostructural with its 4f counterpart cerium at ultra high pressures. The measured static equation of state of thorium to 300GPa (volume fraction V/V o = 0.40) at 300K is given. At high pressures, the sd to f electronic transfer has significant influence on the measured equation of state of thorium. |
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| Keywords: | Thorium phase transformations equation of state energy dispersive X-ray diffraction synchotron source |
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