Progress in the realization of a practical pressure scale for the range 1–300 GPa

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.

Keywords:

• International practical pressure scale (IPPS)
• Ruby pressure scale
• EOS standards
• EOS forms

Acknowledgements

The author would like to thank very much A. Dewaele and P. Loubeyre for providing their data in digital form and for the critical questions concerning also the robustness of the present approach with respect to the selection of a specific EOS-form. This question stimulated the comparison with the ER2- and BE2-forms and lead to the new experimental support for the APL.