Comment on “Raman spectra of low- and high-density amorphous ices” [Chem. Phys. Lett. 293 (1998) 412]

It has recently been proposed by Kanno, Tomikawa and Mishima that novel Raman spectra for amorphous ices show that the low-density form (LDA) resembles ice whilst the high-density form (HDA) resembles lithium chloride glasses. The purpose of this Letter is to stress that the differences between LDA and HDA are not this great. In particular, a key difference is that LiCl glasses contain a large number of vacancies, whilst there are none in any of the amorphous forms of water.