High pressure X-ray diffraction study of potassium azide

Cheng Ji, Fuxiang Zhang, Dongbin Hou, Hongyang Zhu, Jianzhe Wu, Ming Chien Chyu, Valery I. Levitas, Yanzhang Ma

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


Crystal structure and compressibility of potassium azide was investigated by in-situ synchrotron powder X-ray diffraction in a diamond anvil cell at room temperature up to 37.7 GPa. In the body-centered tetragonal (bct) phase, an anisotropic compressibility was observed with greater compressibility in the direction perpendicular to the plane containing N3- ions than directions within that plane. The bulk modulus of the bct phase was determined to be 18.6(7) GPa. A pressure-induced phase transition may occur at 15.5 GPa.

Original languageEnglish
Pages (from-to)736-739
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Issue number6
StatePublished - Jun 2011


  • Anisotropic compressibility
  • Diamond anvil cell
  • Phase transition
  • Synchrotron X-ray diffraction


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