Raman, FTIR, photoacoustic-infrared, and inelastic neutron scattering spectra of ternary metal hydride salts A2MH5, (A = Ca, Sr, Eu; M = Ir, Rh) and their deuterides |
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Authors: | Barsan Mirela M Butler Ian S Gilson Denis F R Moyer Ralph O Zhou Wei Wu Hui Udovic Terrence J |
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Institution: | Department of Chemistry, McGill University, 801 Sherbrooke Street, West. Montreal, QC H3A 2K6, Canada. |
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Abstract: | The vibrational spectra of the ternary metal hydride (deuteride) salts, A(2)MH(5) and A(2)MD(5), where A = calcium, strontium and europium and M = iridium(I) and rhodium(I), have been assigned using Raman, Fourier transform infrared, photoacoustic infrared, and inelastic neutron scattering spectroscopies and density functional theory (DFT) calculations. The wavenumbers of the infrared-active stretching vibrations depend upon the ionization energies of the central metal atom and the cation. The phase transition in calcium pentahydridoiridate(I) was studied as a function of temperature and pressure. |
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