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.

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.
References in periodicals archive ?
The X-ray diffraction showed that all the solid samples were pure apatite with crystallizing in the hexagonal system [P6.sub.3]/m, which was confirmed by comparing with the JCPDS reference for cadmium hydroxyapatite (00-014-0302) (Figure 1).
Time-dependent luminescence measurements show a bi-exponential decay behaviour for each investigated [Eu.sup.3+] doped apatite, which can be explained by the two distinct sites occupied by [Eu.sup.3+] within the apatite structure (see Fig.
Only apatite present in minor amounts and usually forming grains < 0.2 mm (occasionally up to 1 mm) in size is described.
Source of trace elements in human body is via ingestion of food or on exposure to the environment, incorporated into the apatite structure of the enamel.
Bertran, "Apatite bone cement reinforced with calcium silicate fibers," Journal of Materials Science: Materials in Medicine, vol.
The apatite used in this work was obtained from Hazm Al-jalamid area, northern Saudi Arabia.
These properties confirmed the samples were apatite (cf.
The growth of apatite on TNTA and Zn-TNTA specimens was studied by in-vitro immersion studies in Hank's solution for a period of 14 days.
The scleractinian coral genus Goniopara, which possesses a microstructure resembling that of cancellous bone, has been converted to hydroxy apatite [Coralline Hydroxy Apatite Goniopora (CHAG)], chiefly for use as an alternative to autogenous grafting in the management of residual subchondral osseous defects following elevation of depressed articular fragments of epiphyseal-metaphyseal long bone fractures.
Non-metallic minerals are apatite, quartz, hornblende, actinolite, epidote, chlorite, Saussure, pomegranate.