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 luminescence properties of undoped Ca- and Sr-apatites are very similar, whereas Mg-apatite showed only one intense broad luminescence band, which looks similar to the luminescence ascribed to the excitonic luminescence in Ca- and Sr-based apatites.
The enamel or the biological apatite has quite a lot of difference in the calcium to phosphorous ratio in its structure leading to a lot of calcium deficient areas.
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.
During the past 23 years of mining operations the most economically important minerals have been quartz, tourmaline and apatite.
Natural apatites usually contain various anionic and cationic substituents as well as accompanying minerals, which affect their chemical properties.
RPs from Egypt, Morocco, North Carolina, and Sechura contain francolite (carbonate apatite) as the major apatite mineral, while Queensland and Christmas Island A-ore contain fluorapatite.
The aim of this work is to use REE geochemistry of fossil vertebrate apatite in an attempt to reveal the palaeoenvironmental conditions and depositional history of the Vesiku Bone Bed, and by inference, provide insights into vertebrate palaeoecology.
Both when combined together have an enhanced ef- fect by improving apatite crystallinity and reducing acid reactivity of synthetic carbonated apatites.
Papers from the symposium are collected here in 21 sections on topics including alumina/zirconia ceramics, apatites, bioglasses and glass-ceramics, biomimetics, bone substitutes, calcium phosphate ceramics, cell materials interactions, and dements.