Vibrational spectra of Ba2Cu(HC00)(6) crystals

Polarized Raman spectra of single crystals of barium copper formats [Ba2Cu( HCOO)(6)] at room temperature were recorded and analysed, The spectra were obtained for geometries allowing the observation of A(TO) and B (TO + LO) s pecies. The assignment of the fundamental modes was performed on the basis of formate group vibrations and correlations with previous data reported fo r other formate crystals, The observation of four separate wavenumbers for all internal modes of formate ion is indicative of four crystallographicall y non-equivalent formate ions in the unit cell. Copyright (C) 2000 John Whe y & Sons, Ltd.