High-pressure structural studies of energetic compounds

Iain D. H. Oswald, David I. A. Millar, Alistair J. Davidson, Duncan J. Francis, William G. Marshall, Colin R. Pulham, Adam Cumming, Alistair R. Lennie, John E. Warren

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The phase diagram of the energetic material hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) has been explored using X-ray and neutron diffraction from ambient pressure to 8GPa. Two phases of RDX have been structurally characterized. The high-pressure -polymorph exists above 4GPa while the metastable -polymorph has been isolated from the high boiling point solvent nitrobenzene. Interestingly, neutron diffraction measurements at high pressures and high temperatures show that the -polymorph isolated under ambient conditions is not the same polymorph as can be accessed at high pressures and temperatures.

Original languageEnglish
Pages (from-to)280-291
Number of pages12
JournalHigh Pressure Research
Issue number2
Publication statusPublished - 2010


  • phase diagram
  • phase transition
  • energetic material
  • X-ray
  • neutron
  • diamond anvil cell
  • crystal structure
  • gamma-RDX
  • polymorphs
  • phase
  • Hexahydro-1,3,5-Trinitro-S-Triazine
  • spectroscopy
  • temperature


Dive into the research topics of 'High-pressure structural studies of energetic compounds'. Together they form a unique fingerprint.

Cite this