- a common mineral, calcium fluorophosphate, Ca5FP3O12, occurring in individual crystals and in masses and varying in color, formerly used in the manufacture of phosphate fertilizers.
Origin of apatite
1795–1805; < Greek apát(ē) trickery, fraud, deceit + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for apatite
The usual association with apatite and magnetite crystals is noted.Mount Rainier
Apatite and topaz are both colourless and of irregular form.
In its general appearance, apatite exhibits wide variations.
With regard to its mode of occurrence, apatite is found under a variety of conditions.
The accessory minerals of these rocks are principally oligoclase, muscovite, apatite and zircon.
- 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: Ca 5 (PO 4,CO 3) 3 (F,OH,Cl). Crystal structure: hexagonal
C19: from German Apatit, from Greek apatē deceit; from its misleading similarity to other minerals
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- Any of several usually green, transparent, hexagonal minerals consisting of calcium phosphate with either fluorine, hydroxyl, chlorine, or carbonate. Apatite occurs in igneous, metamorphic, and sedimentary rocks, and is used as a source of phosphate for making fertilizers. Chemical formula: Ca5(PO4CO3)3(F,OH,Cl).
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.