Abstract
The equations of state measured under ambient temperature in the Mbar range are reviewed, focusing on experiments using diamond anvils cells with a quasi-hydrostatic pressure transmitting medium (helium or neon) and coupled with X-ray diffraction. Equations of state (EoS) parameters are listed with an unified pressure metrology for all data. This metrology is based on the efforts made in the 2000s to update the ruby luminescence pressure scale, after the collection of original data. To complete this database, unpublished P-V data for lead (Pb), sodium chloride (NaCl) and lithium fluoride (LiF) are also provided with the same metrology. Systematic effects of the pressure metrology on the EoS parameters are discussed.
Highlights
Ambient temperature equations of state (EoS) V ( P, T = 300 K) describe the evolution of bonding in solids under high compression
In static high-pressure devices such as diamond anvil cells (DACs), the unit cell volume V is measured with X-ray diffraction (XRD) and the pressure P is estimated using a pre-calibrated gauge
In the 2000s, the calibration of the most widely used gauge in DACs, ruby luminescence, has been updated on the basis of new measurements made in quasi-hydrostatic pressure transmitting media [1,2,3,4,5]
Summary
The EoS measured under quasi-hydrostatic compression published before, or during the period of ruby metrology updates have to be corrected. I present here EoS parameters for several simple solids (metals-alkali halides-diamond) measured with similar techniques in the Mbar range, between 2003 and 2012, which originally considered various calibrations of the ruby luminescence gauge. LiF are standards for static and dynamic compression measurements, and Pb behavior under high compression is typical of post-transition metals, and used as a standard. These measurements are presented in the third section and compared with literature data. He ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby ruby [9]
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