- a pale green to purple mineral, found in igneous rocks and metamorphosed limestones. It is used in the manufacture of phosphorus, phosphates, and fertilizers. Composition: calcium fluorophosphate or calcium chlorophosphate. General formula: Ca5(PO4,CO3)3(F,OH,Cl). Crystal structure: hexagonal
WordReference Random House Unabridged Dictionary of American English © 2017
- Mineralogya common mineral, calcium fluorophosphate, Ca5FP3O12, occurring in individual crystals and in masses and varying in color, formerly used in the manufacture of phosphate fertilizers.
- Greek apát(ē) trickery, fraud, deceit + -ite1