Apatites

**Definition:** A group of phosphate minerals that includes ten mineral species and has the general formula X5(YO4)3Z, where X is usually calcium or lead, Y is phosphorus or arsenic, and Z is chlorine, fluorine, or OH-. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

**Tree numbers:** - D01.029.260.700.675.374.075.025 - D01.146.360.050 - D01.578.122 - D01.695.625.675.650.075.025

**Synonyms:** - Apatite