in water Displacement reactions are carried out with single crystal plates and powders which are reacted at different temp. (20-100°C) with an excess of aq. Na-salt soln. for different times.;

NH3*H2O in ammonia; water; nitric acid aq. HNO3; aq. NH3; addn. of calcite and 30percent nitric acid to 0.42 M aqueous soln. of phosphoric acid maintaining pH at 1, addn. of 5.3 M aqueous ammonia at 20°C at rate 1.3 ml/min; molar ratio Ca:P was 1.67; keeping for 24 h, isolation of precipitate, washing with hot distd. water, filtration, drying in air, drying at 150°C for 3 h, X-ray diffraction and IR;

water at 1100°C in helical tube-still; H2O vapor or other gases;

heating;

boiling with K2CO3; sintering with chalk;

heating with NaNO3; Ca-Al-Silicate heating with chalk;

at 1000-1400°C;

heating to melting;

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heating;