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X-ray and neutron powder diffraction...

Papanearchou, Nearchos I.

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X-ray and neutron powder diffraction studies of a biocompatible apatite.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	X-ray and neutron powder diffraction studies of a biocompatible apatite./
作者:	Papanearchou, Nearchos I.
面頁冊數:	54 p.
附註:	Source: Masters Abstracts International, Volume: 39-02, page: 5190.
Contained By:	Masters Abstracts International39-02.
標題:	Condensed matter physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1401494
ISBN:	9780599955516

X-ray and neutron powder diffraction studies of a biocompatible apatite.
Papanearchou, Nearchos I.

X-ray and neutron powder diffraction studies of a biocompatible apatite. - 54 p.

Source: Masters Abstracts International, Volume: 39-02, page: 5190.

Thesis (M.S.)--Florida Atlantic University, 2000.

The problem of the carbonate substitution in bioapatites is studied via x-ray and neutron powder diffraction. A series of samples of low temperature carbonate hydroxyapatites with varying carbonate content was synthesized. The carbonate solubility in the hydroxyapatite system was studied with x-ray diffraction. The detailed crystal structure parameters of the synthetic carbonate hydroxyapatites were studied as a function of temperature and carbonate content from the analysis of Rietveld refinements of neutron powder diffraction data. The phosphate tetrahedron is distorted by the carbonate substitution. The tetrahedral bond lengths P-O1 and P-O2 decrease by 2--3%. The atomic displacement parameters (ADPs) of the tetrahedral P, O1, O2, and O3 sites reveal a static disorder in the carbonate hydroxyapatite specimens. The results of the present comparison are consistent with the mechanism of carbonate substitution on the mirror plane of the phosphate tetrahedron.

ISBN: 9780599955516Subjects--Topical Terms:

3173567
Condensed matter physics.

X-ray and neutron powder diffraction studies of a biocompatible apatite.
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245 1 0 $a X-ray and neutron powder diffraction studies of a biocompatible apatite.
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500 $a Source: Masters Abstracts International, Volume: 39-02, page: 5190.
500 $a Adviser: Theodora Leventouri.
502 $a Thesis (M.S.)--Florida Atlantic University, 2000.
520 $a The problem of the carbonate substitution in bioapatites is studied via x-ray and neutron powder diffraction. A series of samples of low temperature carbonate hydroxyapatites with varying carbonate content was synthesized. The carbonate solubility in the hydroxyapatite system was studied with x-ray diffraction. The detailed crystal structure parameters of the synthetic carbonate hydroxyapatites were studied as a function of temperature and carbonate content from the analysis of Rietveld refinements of neutron powder diffraction data. The phosphate tetrahedron is distorted by the carbonate substitution. The tetrahedral bond lengths P-O1 and P-O2 decrease by 2--3%. The atomic displacement parameters (ADPs) of the tetrahedral P, O1, O2, and O3 sites reveal a static disorder in the carbonate hydroxyapatite specimens. The results of the present comparison are consistent with the mechanism of carbonate substitution on the mirror plane of the phosphate tetrahedron.
590 $a School code: 0119.
650 4 $a Condensed matter physics. $3 3173567
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710 2 $a Florida Atlantic University. $3 1017837
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