Fig. 2 X-ray diffractogram of the precipitates formed at 1 M NH4H2PO4, 10-2 M Al, pH 4.0, and various Fe(III)/Al molar ratios. The aging period was 4 wk at 23°C
Fig. 2 X-ray diffractogram of the precipitates formed at 1 M NH4H2PO4, 10-2 M Al, pH 4.0, and various Fe(III)/Al molar ratios. The aging period was 4 wk at 23°C