Magnesium phosphate is an ionic salt of magnesium and phosphate appearing in several forms and several hydrates. This is a compound with a hydrated crystalline structure. It also occurs in amorphous forms. This mineral founds in bones, and the seeds of many plants. It is a source of supplemental dietary magnesium. It has its other names as Phosphoric Acid Magnesium salt and Tri magnesium Diphosphate.