Raman and infrared spectra of solid hydrogen selenide

Abstract

Raman and infrared spectra of solid H,Se at temperatures between 85 and 20 K are reported and interpreted. The broad peaks observed in the spectra of phase I1 are characteristic of an orientationally disordered crystal, whereas the multiple components of the internal modes and rich lattice spectra found for phase 111 are indicative of an ordered structure. The unit cell for this phase is probably centrosymmetric and contains at least four molecules. Plausible assignments for all observed spectroscopic features are proposed.

Synthesis and properties of selenium trihydride at high pressures

“…2). This peak can be assigned to the H-Se stretching mode 33 At 4.6 GPa, remarkably, a new crystal of a columnar habit grows up (Fig. 1b), similar to the observation of (H 2 S) 2 H 2 30 .…”

“…To synthesize a H 3 Se solid, we slowly compressed the fluids to about 5 GPa forming a single crystal ( Fig. 1) 33 . Our room temperature experiments to 21.6 GPa yielded the results similar to those of Ref.…”