Raman spectroscopic studies of phase E to 19 GPa

A. K. Kleppe, A. P. Jephcoat, N. L. Ross

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Raman spectra of phase E have been measured between 100 cm-1 and 4000 cm-1 in a diamond-anvil cell to 19 GPa at 300 K. We observe several broad bands in the region below 1200 cm-1 and three bands in the OH stretching region. All modes shift continuously with increasing pressures to 19 GPa and there is no indication for a major change in the crystal structure of phase E. First constraints on hydrogen sites and hydrogen bond strengths are derived from the OH frequencies together with their pressure dependencies and the correlation of OH stretching frequencies with O...O bond distances. The 3429 cm-1 band decreases linearly with pressure at -7.8 cm-1/GPa and is clearly involved in hydrogen bonding. The corresponding O...O distance at ambient conditions is estimated to be around 2.82 Å. The 3617 cm-1 band shows a positive pressure trend allowing only very weak or absent hydrogen bonds. Corresponding O...O distances would be greater than 3 Å.

Original languageEnglish
Pages (from-to)1275-1281
Number of pages7
JournalAmerican Mineralogist
Volume86
Issue number10
Publication statusPublished - 2001
Externally publishedYes

Fingerprint

hydrogen
Hydrogen bonds
Stretching
hydrogen bonds
diamond anvil cell
Diamond
anvils
crystal structure
Raman scattering
Hydrogen
indication
Crystal structure
diamonds
Raman spectra
broadband
trends
shift
cells
trend

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Kleppe, A. K., Jephcoat, A. P., & Ross, N. L. (2001). Raman spectroscopic studies of phase E to 19 GPa. American Mineralogist, 86(10), 1275-1281.

Raman spectroscopic studies of phase E to 19 GPa. / Kleppe, A. K.; Jephcoat, A. P.; Ross, N. L.

In: American Mineralogist, Vol. 86, No. 10, 2001, p. 1275-1281.

Research output: Contribution to journalArticle

Kleppe, AK, Jephcoat, AP & Ross, NL 2001, 'Raman spectroscopic studies of phase E to 19 GPa', American Mineralogist, vol. 86, no. 10, pp. 1275-1281.
Kleppe AK, Jephcoat AP, Ross NL. Raman spectroscopic studies of phase E to 19 GPa. American Mineralogist. 2001;86(10):1275-1281.
Kleppe, A. K. ; Jephcoat, A. P. ; Ross, N. L. / Raman spectroscopic studies of phase E to 19 GPa. In: American Mineralogist. 2001 ; Vol. 86, No. 10. pp. 1275-1281.
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