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Comparative Study on Crystal Structures and Synthetic Techniques of Ternary Hafnium/Zirconium Fluorides
Mild hydrothermal synthesis was employed to grow high-quality
single
crystals of ternary fluoridohafnates at low temperatures. The series
of new materials was characterized using single-crystal X-ray diffraction,
and the crystal structures of AHfF6 (A = Mg and Sr), A2HfF8 (A = Ba and Pb), Ca5Hf3F22, and Cd2HfF8(H2O)6 are discussed herein. Although some material compositions
have similar stoichiometries, all of the compositions adopt different
structural motifs. A comparison of the crystal structures and synthesis
techniques of ternary fluoridohafnates and ternary fluoridozirconates
is also reported, and the impact of the subtle changes of synthesis
conditions on overall structures is discussed