磷灰石
Apatite \Ap"a*tite\, n. [Gr. ? deceit, fr. ? to deceive; it having been often mistaken for other minerals.] (Min.) Native phosphate of lime, occurring usually in six-sided prisms, color often pale green, transparent or translucent.
apatite n : a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus