in water boiling under reflux; crystn. by evapn.;

in neat (no solvent) byproducts: H2O; heating under dynamic synthetic air atm. (flow of 100 cm**3/min) at a heating rate of 5°C/min to 180°C; analyzed by means of X-ray diffraction;

removal of water of crystallization by heating at 130 °C;;

ammonium fluoride in water T=150°C; 96 h; AutoclaveHigh pressure;