Thermal analysis of complex fluorides

A number of fluorometallates has been investigated by thermal analysis to establish the decomposition stoichiometry and to determine the conditions where stable intermediate phases can be isolated. The decomposition reactions of fluorovanadates depend on the atmosphere. For ammonium hexafluorometallates and potassium pentafluoroaquametallates the decomposition temperatures or enthalpies can be correlated to crystal field stabilization energies.