Infrared studies of some fluorozirconates

Abstract

I.r. spectra and assignments are reported for (NH₄)₃ZrF₇, (NH₄)₂ZrF₆, NH₄ZrF₅, NH₄ZrF₅,H₂O, K₂ZrF₆, K₂HfF₆, Cs₂ZrF₆, for the 4000–200 cm.^–1 region. The zirconium–fluorine vibrations are exhibited as broad-band systems because of the low-site symmetries of the polyhedral anions. For the ammonium salts the spectra indicate the presence of week hydrogen-bonding. The spectrum of the hydrate is consistent with the presence on non-co-ordinated water, hydrogen-bonded in the crystal lattice.