Solid State Communications, vol.87, no.8, pp.675-678, 1993 (SCI-Expanded)
Experimental results of Raman scattering spectra of ε{lunate}-InSe crystals are presented at 300 K and pressures up to 10.2 kbar. Values of the mode-Grüneisen parameters were calculated using frequency-pressure dependences for five observed phonons. Changes of the shear force constants under pressure were analysed using linear-chain model both for ε{lunate}-InSe and ε{lunate}-GaSe crystals. The decrease of the shear force constants between metallic planes with increasing pressure are explained qualitatively by charge transfer from intralayer to interlayer space. © 1993.