Abstract
Sodium triphosphate hexahydrate and lithium triphosphate pentahydrate were prepared by adding, respectively, sodium chloride and lithium chloride into triphosphate solution. Sodium triphosphate hexahydrate decomposed to produce ortho- and diphosphates below 200°C. The ortho- and diphosphates were polymerized to triphosphate at 300 to 600°C. Lithium triphosphate pentahydrate degraded to produce ortho- and diphosphates at around 100°C. On heating at a temperature higher than 180°C, the thermally produced ortho- and diphosphates reorganized to diphosphate and oligophosphates with chain lengths longer than that of triphosphate and did not reproduce triphosphate.
