Abstract

X-ray diffraction measurements on diamond and various metals under hydrostatic pressures up to ∼140 GPa together with determinations of ruby luminescence line shifts provide new constraints for the refinement of a practical pressure scale based on either the ruby line shift or the X-ray diffraction with the given calibrants. Implications for other high-pressure studies with diamond anvil pressure cells as well as for theoretical high-pressure studies and for equation of state forms are discussed.

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