The IR spectra of polycrystalline Mg(OH)(2) and ME(OD)(2) are reported in t
he 4000-40 cm(-1) region. Band assignments were discussed on the basis of i
sotopic band shifts of the fundamental vibrations by combining the results
of factor group analysis for D-3d(3) crystal structure with the Teller-Redl
ich product rule for crystal vibrations. The band assignments proposed are
different from the previous IR spectroscopic studies. (C) 2001 Elsevier Sci
ence B.V. All rights reserved.