反应条件
ammonia; EDTA; HCl in ethanol; water High Pressure; to a soln. of metal salt with EDTA at pH 2-3 (HCl, NH3) added a water/ethanol soln. of NH4F, treated at 180°C for 20 h; cooled to room temp., ppt. filtered, washed (water), dried (80°C,air); XRD, TEM;
