apatitiryhmän
Apatitiryhmän refers to a group of phosphate minerals characterized by their hexagonal crystal structure and the general chemical formula A5(XO4)3Z, where A represents cations like calcium, strontium, barium, or lead, X is typically phosphorus, and Z is a halide like fluoride, chloride, or hydroxide. The most common and well-known member of this group is apatite, specifically hydroxyapatite, which is a primary mineral component of vertebrate teeth and bones.
Other significant minerals within the apatite group include fluorapatite (Ca5(PO4)3F) and chlorapatite (Ca5(PO4)3Cl). These minerals are
Apatite group minerals are relatively hard and have a Mohs hardness typically between 5 and 5.5. They