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Single-Crystal, Polarized, Raman Scattering Study Of The Molecular And Lattice Vibrations For The Energetic Material Cyclotrimethylene Trinitramine, James C. Haycraft, Lewis L. Stevens, Craig J. Eckhardt
Single-Crystal, Polarized, Raman Scattering Study Of The Molecular And Lattice Vibrations For The Energetic Material Cyclotrimethylene Trinitramine, James C. Haycraft, Lewis L. Stevens, Craig J. Eckhardt
Craig J. Eckhardt Publications
The single-crystal, polarized, Raman spectra for cyclotrimethylene trinitramine (RDX) have been studied at room temperature and pressure over the region of 5–3400 cm-1. While the observed Raman bands agree well with a previous Raman study, this work provides a consistent interpretation of the Raman spectra by assignment of fundamental modes, overtones, and combination bands. A total of 56 internal vibrations were observed, 36 of which were labeled as fundamental molecular vibrations. In addition, all 24 lattice optical phonons are identified. All six possible polarizations were probed to obtain the Ag, B1g, B2 …
The Elastic Constants And Related Properties Of The Energetic Material Cyclotrimethylene Trinitramine (Rdx) Determined By Brillouin Scattering, James J. Haycraft, Lewis L. Stevens, Craig J. Eckhardt
The Elastic Constants And Related Properties Of The Energetic Material Cyclotrimethylene Trinitramine (Rdx) Determined By Brillouin Scattering, James J. Haycraft, Lewis L. Stevens, Craig J. Eckhardt
Craig J. Eckhardt Publications
The acoustic phonons of cyclotrimethylene trinitramine (RDX) have been studied using Brillouin scattering. The analysis of the acoustic-phonon velocities allowed determination of the complete stiffness tensor for this energetic material. The results are compared to other recent experimental and theoretical determinations of the RDX elastic constants, bulk moduli, and shear moduli. The observed ordering of elastic constants, C11>C22>C33, is qualitatively associated with a (001) cleavage plane and molecular packing. This interpretation is further corroborated by the linear compressibilities plotted in three crystallographic planes, and a comparison to recent theoretical and experimental hydrostatic compression studies …