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 ?
Scales and spines of different morphological groups and variable histologies of the genus Nostolepis have been selected for this purpose in order to compare data from fossil apatite biomineral of different hard tissue structure and crystallinity, while avoiding any potential intertaxonomic bias.
The SEM images of the apatite layer formed on the surface of nanocomposites are shown in Figs 2a-2f.
Apatites with different levels of fluoride, carbonate, magnesium, and cadmium substitutions were prepared by precipitation from aqueous solution at 80[degrees]C.
XRD results showed that apatite and quartz persisted to the highest calcination temperature of 1100 [degrees] C.
From the comparative study in Table 1, it can be summarized that though we maintain the Ca:P ratio1:66 in the prepared solution, but addition of Na changes this ratio in synthesized doped apatites.
It appears that recent NMR solid-state spectroscopy studies have removed the doubts related to previous difficulties with detecting OH- in the structure of skeletal apatites (Cho et al.
However, apatites as they occur in biological tissues, mineral formations and laboratory products can incorporate a wide variety of impurities and are seldom found in pure stoichiometric form.
Synthesized apatites were characterized by different analytical procedure.
Among the topics are tissue engineering, osteoinductive materials, dental materials, wear, bioactive coatings and biomimetic apatites, ceramic composites, and nanomaterials.
The carbonate ion, when incorporated into HAP yields carbonated apatites with various chemical formulae.