Physics and Chemistry of Minerals

, Volume 25, Issue 6, pp 434–441

High-pressure and high-temperature in situ X-ray diffraction study of iron and corundum to 68 GPa using an internally heated diamond anvil cell

  • Leonid S. Dubrovinsky
  • Surendra K. Saxena
  • Peter Lazor
ORIGINAL PAPER

DOI: 10.1007/s002690050133

Cite this article as:
Dubrovinsky, L., Saxena, S. & Lazor, P. Phys Chem Min (1998) 25: 434. doi:10.1007/s002690050133

Abstract 

Using powder X-ray diffraction of heated solids to pressures reaching 68 GPa, the pressure-volume-temperature (PVT) data on corundum Al2O3 and ɛ-Fe were determined with the following results:

*Corundum,*Iron, *Al2O3*ɛ-Fe

Isothermal bulk*258 (2)*164 (3)  modulus K'300, 1 (GPa)

Pressure derivative K300, 1*4.88 (4)*5.36 (16)

Temperature derivative*–0.020 (2)*–0.043 (3)  (∂KT,1/∂T)P (GPa/K)

Molar volume V300,1*25.59 (2)*6.76 (2)  (cm3/mol)

Isobaric thermal expansion at 1 atm (0.101 MPa) is given by (K–1):

αT=2.6 (2) 10–5+1.81 (9) 10–9T–0.67 (6)/T2 for corundum, and αT=5.7 (4) 10–5+4.2 (4) 10–9T–0.17 (7)/T2 for iron ɛ-Fe.

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Leonid S. Dubrovinsky
    • 1
  • Surendra K. Saxena
    • 1
  • Peter Lazor
    • 1
  1. 1.Institute of Earth Sciences, Uppsala University, S-75236 Uppsala, SwedenSE