Equation of state for technetium from X-ray diffraction and first-principle calculations
- Univ. of Nevada, Las Vegas, NV (United States)
Here, the ambient temperature equation of state (EoS) of technetium metal has been measured by X-ray diffraction. The metal was compressed using a diamond anvil cell and using a 4:1 methanol-ethanol pressure transmitting medium. The maximum pressure achieved, as determined from the gold pressureEquation of state for technetium from X-ray diffraction and first-principle calculations scale, was 67 GPa. The compression data shows that the HCP phase of technetium is stable up to 67 GPa. The compression curve of technetium was also calculated using first-principles total-energy calculations. Utilizing a number of fitting strategies to compare the experimental and theoretical data it is determined that the Vinet equation of state with an ambient isothermal bulk modulus of B0T=288 GPa and a first pressure derivative of B'=5.9(2) best represent the compression behavior of technetium metal.
- Research Organization:
- Univ. of Nevada, Las Vegas, NV (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0001982; AC04-94AL85000; #DE-NA0001982; NA0001974; FG02-99ER45775; AC02-06CH11357
- OSTI ID:
- 1332762
- Alternate ID(s):
- OSTI ID: 1333840; OSTI ID: 1359445
- Report Number(s):
- SAND-2015-0656J; PII: S0022369716300506
- Journal Information:
- Journal of Physics and Chemistry of Solids, Vol. 95, Issue C; ISSN 0022-3697
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Reverse-martensitic hcp-to-fcc transformation in technetium under shock compression
|
journal | July 2018 |
Zero-Kelvin Compression Isotherms of the Elements 1 ≤ Z ≤ 92 to 100 GPa
|
journal | December 2016 |
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