Structure refinement of sub-cubic-mm volume sample at high pressures by pulsed neutron powder diffraction: Application to brucite in an opposed anvil cell

Takuo Okuchi, Naotaka Tomioka, Narangoo Purevjav, Jun Abe, Stefanus Harjo, Wu Gong

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9 Citations (Scopus)


Neutron powder diffraction measurements of 0.9 mm3 of mixture of deuterated brucite and pressure medium were conducted at pressures to 2.8 GPa, using an opposed anvil cell and a medium-resolution diffractometer at Japan Proton Accelerator Research Complex pulsed neutron source. Spurious-free diffraction patterns were successfully obtained and refined to provide all structural parameters including Debye-Waller factors. Tilting of hydroxyl dipoles of brucite toward one of the three nearest-neighbor oxygen anions was confirmed to be substantial at pressure as low as 1.5 GPa. By this application, technical feasibility to analyze such a small sample has been newly established, which would be useful to extend the applications of neutron diffraction at high pressures.

Original languageEnglish
Pages (from-to)273-280
Number of pages8
JournalHigh Pressure Research
Issue number2
Publication statusPublished - Apr 3 2014



  • hydrogen
  • pulsed neutron powder diffraction
  • structure refinement

ASJC Scopus subject areas

  • Condensed Matter Physics

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