Influence of Amine and Aluminum Concentrations

At constant concentrations of Al(OH)3,3D pyrochlore is always obtained at small HF and amine contents this feature is consistent with the hydroxylation and the inorganic nature of this pyrochlore Al2[Fo.5(OH)o.5]6 H2O. With tren amine, the crystallization domain of pyrochlore is shifted towards higher Al(OH)3/HF ratios when [Al ] increases though the [HF + F ] concentration increases in the solution. 

Fluoride crystallization is not strongly influenced by the chemical state of the amine. 

These general trends are helpful to establish the opportunity of a difficult ab initio structure determination from powder diffraction data. 

The evaporation of a solution of Al(OH)3, guaz, HFaq., H2O in 1/5/4.5/55.5 ratio at room temperature leaves transparent crystals of the hydrate [Rguaz 2 (A1F5(H20)) 2H2O. On 

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