Neutron diffraction study of hydrous phase G: Hydrogen in the lower mantle hydrous silicate, phase G

Akio Suzuki, Eiji Ohtani, Tadashi Kondo, Takahiro Kuribayashi, Nobuo Niimura, Kazuo Kurihara, Toshiyuki Chatake

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18 Citations (Scopus)

Abstract

A neutron powder diffraction study was performed to determine the sites occupied by hydrogen in the structure of DHMS phase G, which is stable at the pressure-temperature conditions of the transition zone and lower mantle. The diffraction data from small samples (about 3 mg) were collected by using a highly sensitive imaging plate detector at the BIX-3 beamline at JRR-3M nuclear plant in JAERI Tokai Laboratory, Japan. The present neutron diffraction data reveal that hydrogen (and deuterium) is located in the 6k site of Wykoff letter in the MO6 layer of the phase G structure with the space group P31m. The bond lengths of O-H and O-D are 1.1(4) and 0.8(3) A, respectively. This result is consistent with previous Raman spectroscopic studies of this phase.

Original languageEnglish
Pages (from-to)3987-3990
Number of pages4
JournalGeophysical Research Letters
Volume28
Issue number20
DOIs
Publication statusPublished - 2001 Oct 15

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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