Generating near-earth-core pressures with type-IIa diamonds

Academic Article


  • In the past year static pressures of 378 and 416 GPa, greater than the pressure at the center of the earth (361 GPa), were achieved and carefully measured for the first time (x-ray diffraction on W and Mo, respectively) using extremely high-quality type-Ia diamonds (containing nitrogen platelets). In this letter, we show that type-IIa diamonds (containing no nitrogen) can reach similar pressures (338 GPa by x-ray diffraction on Pt) thus showing that the strength depends primarily on crystalline perfection (and not on nitrogen platelets). Nearly perfect type-IIa diamonds are rare.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Ruoff AL; Luo H; Vanderborgh C; Vohra YK
  • Start Page

  • 2681
  • End Page

  • 2682
  • Volume

  • 59
  • Issue

  • 21