FURTHER EVIDENCE FOR THE EXISTENCE OF 2 KINDS OF H-BONDS IN ICE IH - COMMENTS

The evidence for the presence of two type of H-bondings in ice recentl y proposed by Li et al. [Phys. Lett. A 192 (1994) 295; Nature 365 (199 3) 327] is critically examined. We demonstrate that these ''new'' obse rvations can be explained adequately by existing experimental data and theoretical results without the need to invoke two widely different h ydrogen bond strengths. The vibrational density of states for H2O dope d D2O is, in fact, consistent with earlier well-known spectroscopic da ta. Contrary to the claim by the authors, the two peak pattern in the translational vibrational density of states and the corresponding Rama n spectra have been successfully reproduced by carefully parameterized intermolecular potentials that include long range electrostatic inter actions.