Static pressure of 255 GPa (2.55 Mbar) by X-Ray diffraction: Comparison with extrapolation of the ruby pressure scale

Academic Article


  • X-ray-diffraction studies have been carried out to 255 GPa on various sample and gasket configurations in the diamond-anvil cell. Intense fluorescence emission bands were observed at 793 and 830 nm in some cases which correspond to 360 and 550 GPa on the extrapolated ruby pressure scale. The x-ray measured pressures were only 185 and 201 GPa, respectively. Reasons for this discrepancy between x-ray methods and optical methods at ultrahigh pressures are proposed. © 1988 The American Physical Society.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Vohra YK; Duclos SJ; Brister KE; Ruoff AL
  • Start Page

  • 574
  • End Page

  • 577
  • Volume

  • 61
  • Issue

  • 5