Titaniphosphoric Acid

Merz obtained a titaniphos- phoric acid, or titanic phosphate, of the composition 2TiO₂.P₂O₅.xH₂O by precipitating titanic chloride solution with a soluble phosphate and thoroughly washing the product. A similar substance was obtained by Wehrlin and Giraud; and by heating together titanic and phosphoric acids, as well as by melting TiO₂ with sodium or potassium meta-phosphate, the crystalline compound TiO₂.P₂O₅ is formed. The following crystallised alkali salts of titaniphosphoric acid have been obtained by Ouvrard:

K₂O.4TiO₂.3P₂O₅; K₂O.2TiO₂.P₂O₅; Na₂O.4TiO₂.3P₂O₅; 6Na₂O.3TiO₂.4P₂O₅.