Powder neutron diffraction of wüstite (Fe0.93O) to 12 GPa using large moissanite anvils

J. Xu*, Y. Ding, S. D. Jacobsen, H. K. Mao, R. J. Hemley, J. Zhang, J. Qian, C. Pantea, S. C. Vogel, D. J. Williams, Y. Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

High-pressure powder neutron diffraction of wüstite-Fe0.93O has been achieved to 12 GPa using a large gemmoissanite (SiC) anvil cell. The moissanite anvils are weakly absorbing and provide greater neutron fluxes to the sample than is possible with tungsten carbide anvils. There is minimal diffraction overlap from the single-crystal moissanite anvils compared to tungsten carbide or synthetic diamond anvils, providing cleaner background profiles. The required sample volume for high-pressure neutron diffraction is dramatically reduced to several cubic millimeters. High-quality powder diffraction patterns of wüstite were recorded at 90 min exposure times on the HIPPO diffractometer at LANSCE when the sample volume was in the range of ∼10 mm3. This is about two orders of magnitude smaller than the necessary sample volume (∼1.0 cm3) for the same kind of experiment with other high-pressure cells and nominal neutron fluxes.

Original languageEnglish (US)
Pages (from-to)247-253
Number of pages7
JournalHigh Pressure Research
Volume24
Issue number2
DOIs
StatePublished - Jun 1 2004

Keywords

  • High pressure
  • Moissanite anvil cell
  • Neutron diffraction
  • Wüstite

ASJC Scopus subject areas

  • Condensed Matter Physics

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