apatite

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ap·a·tite

(ap'ă-tīt),
Generic name for a class of minerals with compositions that are variants of the formula D5T3M, where D is a divalent cation, T is a trivalent tetrahedral compound ion, and M is a monovalent anion; calcium phosphate apatites are important mineral constituents of bones and teeth. See: hydroxyapatite.

apatite

[ap′ətīt]
Etymology: Gk, apate, deceit
an inorganic mineral composed of calcium and phosphate that is found in the bones and teeth.

ap·a·tite

(ap'ă-tīt)
A class of naturally occurring crystalline minerals containing calcium and phosphorus; hydroxyapatite is a component of bones and teeth.
See also: fluorapatite, hydroxyapatite

ap·a·tite

(ap'ă-tīt)
Generic name for a class of minerals with compositions that are variants of the formula D5T3M, where D is a divalent cation, T is a trivalent tetrahedral compound ion, and M is a monovalent anion; calcium phosphate apatites are important mineral constituents of bones and teeth.

apatite (ap´ətīt),

n the inorganic mineral substance of teeth and bone. See also carbonate hydroxyapatite.

apatite

1. calcium phosphate; one of the two mineral constituents of bones and teeth.
2. fluorapatite; a naturally occurring rock mineral containing fluorine.

apatite calculi
see apatite urolith.
References in periodicals archive ?
The concentration of eU in the talus deposit more than twice exceeded the average concentration of the area, characterizing the generally high but extremely variable share of the material originating from graptolite argillite and obolus phosphorite.
We thank Arthur Day and Graeme Smith for preparing the grain mounts, Peter Holmes and Gary Kuhn (Incitec-Pivot Pty Ltd) for the sample of phosphorite from Nauru, and David Harland for input to the text.
Large peat bogs were once in the place of the present phosphorite quarry.
V Comparative geochemistry of shell phosphorites and Dictyonema shales of the Baltic.
143 thousand tonnes, apatite & phosphorite 100 thousand tonnes, dolomite 439 thousand tonnes, limestone 230 lakh tonnes, magnesite 24 thousand tonnes and diamond 2874 carat.
In recent years, China's output of phosphorite has witnessed rapid growth.
The Upper Cambrian Ulgase Formation, Cambrian, Furongian (previously Upper Cambrian), is exposed in a wall of abandoned mineworks (59[degrees]29'21"N, 25[degrees]05'08"E) in a phosphorite mine that was exploited during 1921-1938.
135 thousand tonnes, apatite & phosphorite 86 thousand tonnes, dolomite 524 thousand tonnes, limestone 224 lakh tonnes, magnesite 26 thousand tonnes and diamond 2836 carat.
The design of the mine involves three adits at various locations along the phosphorite bed of Gaoping Phosphate Property.
Phosphorite concretions, phosphatic oolites and phosphatic discontinuity surfaces are recorded mainly in the lower part of the Ordovician carbonate succession in Estonia.