6533b7d0fe1ef96bd125ae42
RESEARCH PRODUCT
Phase diagram of calcium at high pressure and high temperature
Catalin PopescuJ. M. De’athPablo BotellaJordi IbáñezJavier González-platasDaniel ErrandoneaKeith MunroSimone AnzelliniDominik DaisenbergerS. G. MacleodJavier Ruiz-fuertesMalcolm McmahonCraig W. Wilsonsubject
DiffractionEquation of stateMaterials sciencePhysics and Astronomy (miscellaneous)Thermodynamics02 engineering and technologyCubic crystal system01 natural sciencesThermal expansionPhysics::GeophysicsSynchrotronCondensed Matter::Materials SciencePhase (matter)0103 physical sciencesGeneral Materials Science010306 general physicsPhase diagramAlkaline earth metalTransitionsEquation-of-state021001 nanoscience & nanotechnologyX-ray crystallographyX-Ray-diffractionAlkaline-earth metals0210 nano-technologydescription
Resistively heated diamond-anvil cells have been used together with synchrotron x-ray diffraction to investigate the phase diagram of calcium up to 50 GPa and 800 K. The phase boundaries between the Ca-I (fcc), Ca-II (bcc), and Ca-III (simple cubic, sc) phases have been determined at these pressure-temperature conditions, and the ambient temperature equation of state has been generated. The equation of state parameters at ambient temperature have been determined from the experimental compression curve of the observed phases by using third-order Birch-Murnaghan and Vinet equations. A thermal equation of state was also determined for Ca-I and Ca-II by combining the room-temperature Birch-Murnaghan equation of state with a Berman-type thermal expansion model.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-08-30 |