Abstract
The effect is considered of the nature of monovalent potassium and ammonium cations on the structure of complex zirconium(IV) fluorides at different F/Zr ratios. It is shown that $\text{NH}_{4}^{+}$ and K+ fluoridozirconates with the stoichiometric F/Zr ratio of 7-5 form series of compounds with the same composition: M3ZrF7–M2ZrF6–MZrF5·H2O–MZrF5 (M–K+, $\text{NH}_{4}^{+})$ . The formula analogues differ in structure from each other. Vibrational (IR, Raman) spectra of potassium and ammonium fluoridozirconates are systematized, analyzed, and compared. The characteristic spectral features describing the structural features of compounds in the mentioned series are discussed and identified. The results of the study can be useful for the synthesis and structure determination of both new fluoridometallates (zirconates, hafnates, terbates, etc.) and composite materials based on them.
