Any of a group of natural, variously colored calcium phosphate minerals containing fluorine, chlorine, or hydroxyl. These compounds form hexagonal crystals and are components of bones and teeth, are a source of phosphorus for plants, and are used in the manufacture of fertilizers.
Any of a group of variously colored, hard, hexagonal calcium minerals, Ca5(PO4,CO3)3 (F,OH,Cl), found mainly in sedimentary rocks, esp. phosphate rock, and in teeth and bones.
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).
From Greek apatēdeceit (from its often being mistaken for other minerals)
American Heritage Dictionary of the English Language, 5th Edition
Apatite Sentence Examples
The ultimate source of these mineral phosphates may be referred in most cases to the apatite widely distributed in crystalline rocks.
Deciphering continental breakup in eastern Australia by combining apatite (U-Th)/He and fission track thermochronometers.
Other minerals present include diopside, pargasite, spinel, phlogopite, apatite, graphite, pyrrhotite and zircon (Davidson 1943 ).
It is the principal inorganic constituent of bones, and hence of the "bone-ash" of commerce (see Phosphorus); it occurs with fluorides in the mineral apatite (q.v.); and the concretions known as coprolites largely consist of this salt.