Explosives under pressurethe crystal structure of γ-RDX as determined by high-pressure X-ray and neutron di raction COMMUNICATION Swift et al. Structure of a lead urate complex and its e ect on the nucleation of monosodium urate monohydrate CrystEngComm www.rsc.org/crystengcomm
The crystal structure of the highly metastable beta-form of RDX shows that the molecules adopt different conformations compared to the alpha-form and that, contrary to previous reports, the beta-form obtained at ambient pressure is not the same form as that obtained at elevated temperatures and pressures.
Co-crystallisation is proposed as an effective method to adapt the physico-chemical properties of energetic materials, thus presenting the opportunity to fine-tune performance characteristics at the molecular level. This is illustrated by the characterisation of four co-crystals of the high explosive CL-20
The high-pressure, high-temperature epsilon-form of the widely used explosive RDX has been structurally characterised using a combination of diffraction techniques, and a sample of this form has been successfully recovered to ambient pressure.
We thank Dstl and EPSRC for contributions toward a studentship (DIAM), STFC for the provision of synchrotron beamtime, and MOD WPE for funding under the terms of contract RD028-06366. We are very grateful to S. Peiris and J.C. Gump for providing us with data from their x-ray powder diffraction studies.
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