#apatite

• Apatite — A mineral from the phosphate class, representing a natural calcium phosphate that contains fluorine, chlorine, or hydroxyl groups within its crystalline structure. This compound is widely used in industry as the primary raw material for producing phosphate fertilizers and phosphoric acid, while also being the most common phosphate mineral in the Earth's crust.
• Apatite — The standard literary and most frequent form of the name of the natural phosphate mineral; it also represents a major structural component of hard tissues in human and animal organisms, found as hydroxyapatite as the core mineral within the structure of tooth enamel and bones.
• Apatitosis — A rare pathological condition characterized by the abnormal deposition and excessive accumulation of apatite crystals (calcium phosphate) within the body's soft tissues, particularly inside tendons, joints, or muscles. This structural metabolic disorder causes painful chronic inflammation and severe localized calcifications, restricting locomotor mobility.