O8 Cluster Structure of the Epsilon Phase of Solid Oxygen

Hiroshi Fujihisa, Yuichi Akahama, Haruki Kawamura, Yasuo Ohishi, Osamu Shimomura, Hiroshi Yamawaki, Mami Sakashita, Yoshito Gotoh, Satoshi Takeya, and Kazumasa Honda
Phys. Rev. Lett. 97, 085503 – Published 25 August 2006

Abstract

Despite many experimental and theoretical studies, the crystal structure of the ε phase of solid oxygen has not been determined. We performed powder x-ray diffraction experiments and the Rietveld analyses in this study to show that a new arrangement of the monoclinic space group C2/m could fit the diffraction patterns of the ε phase and obtained a structure that consisted of an O8 cluster with 4 molecules. The dependence of the lattice parameters, the molar volume, and the intermolecular distances on the pressure was investigated.

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  • Received 8 June 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.085503

©2006 American Physical Society

Authors & Affiliations

Hiroshi Fujihisa1, Yuichi Akahama2, Haruki Kawamura2, Yasuo Ohishi3, Osamu Shimomura3, Hiroshi Yamawaki1, Mami Sakashita1, Yoshito Gotoh1, Satoshi Takeya1, and Kazumasa Honda1

  • 1National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
  • 2Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako-gun, Hyogo 678-1297, Japan
  • 3Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Mikazuki, Sayo-gun, Hyogo 679-5198, Japan

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Issue

Vol. 97, Iss. 8 — 25 August 2006

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