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Crystal structure of cobalt-substituted calcium hydroxyapatite nanopowders prepared by hydrothermal processing

Authorized Users Only
2010
Authors
Veselinović, Ljiljana
Karanović, Ljiljana
Stojanović, Zoran S.
Bračko, Ines
Marković, Smilja
Ignjatović, Nenad
Uskoković, Dragan
Article (Published version)
Metadata
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Abstract
A series of cobalt-exchanged hydroxyapatite (CoHAp) powders with different Ca/Co ratios and nominal unit-cell contents Ca10-x Cox (PO4)6(OH)2, x = 0, 0.5, 1.0, 1.5 and 2.0, were synthesized by hydrothermal treatment of a precipitate at 473 K for 8 h. Based on ICP (inductively coupled plasma) emission spectroscopy analysis, it was established that the maximum amount of cobalt incorporation saturated at 7sim;12 at.% under these conditions. The effects of cobalt content on the CoHAp powders were investigated using ICP emission spectroscopy, particle size analysis, transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) analyses as well as X-ray powder diffraction (XRPD) including Rietveld analysis. According to XRPD, all the materials are single-phase HAp and CoHAp of low crystallinity. Rietveld analysis shows that Co enrichment causes the c cell parameter to decrease at a faster rate than the a cell parameter. A microstructural analysis showed ...anisotropic X-ray line broadening due to crystallite size reduction. In CoHAp there is significant crystal elongation in [001], and the average size decreases with increasing cobalt content. The crystallite morphology transforms from rod-like for the pure HAp to lamellae at the highest degree of Co substitution. The results of Rietveld refinement (symmetry, size and morphology of the crystallites) were confirmed by TEM and HRTEM analysis. © 2010 International Union of Crystallography. Printed in Singapore-all rights reserved.

Keywords:
CoHAp powders / cobalt-exchanged hydroxyapatite / nanopowders / nanopowders
Source:
Journal of Applied Crystallography, 2010, 43, 2, 320-327
Publisher:
  • Chester: International Union of Crystallography
Projects:
  • Sinteza funkcionalnih materijala sa kontrolisanom strukturom na molekularnom i nano nivou (RS-142006)
Note:
  • Crystallographic information: http://dais.sanu.ac.rs/123456789/3440
  • Rietveld powder data file: http://dais.sanu.ac.rs/123456789/3442

DOI: 10.1107/S0021889809051395

ISSN: 1600-5767

WoS: 000275432600015

Scopus: 2-s2.0-77949615446
[ Google Scholar ]
50
46
URI
http://dais.sanu.ac.rs/123456789/3428
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences of SASA
TY  - JOUR
AU  - Veselinović, Ljiljana
AU  - Karanović, Ljiljana
AU  - Stojanović, Zoran S.
AU  - Bračko, Ines
AU  - Marković, Smilja
AU  - Ignjatović, Nenad
AU  - Uskoković, Dragan
PY  - 2010
UR  - http://dais.sanu.ac.rs/123456789/3428
AB  - A series of cobalt-exchanged hydroxyapatite (CoHAp) powders with different Ca/Co ratios and nominal unit-cell contents Ca10-x Cox (PO4)6(OH)2, x = 0, 0.5, 1.0, 1.5 and 2.0, were synthesized by hydrothermal treatment of a precipitate at 473 K for 8 h. Based on ICP (inductively coupled plasma) emission spectroscopy analysis, it was established that the maximum amount of cobalt incorporation saturated at 7sim;12 at.% under these conditions. The effects of cobalt content on the CoHAp powders were investigated using ICP emission spectroscopy, particle size analysis, transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) analyses as well as X-ray powder diffraction (XRPD) including Rietveld analysis. According to XRPD, all the materials are single-phase HAp and CoHAp of low crystallinity. Rietveld analysis shows that Co enrichment causes the c cell parameter to decrease at a faster rate than the a cell parameter. A microstructural analysis showed anisotropic X-ray line broadening due to crystallite size reduction. In CoHAp there is significant crystal elongation in [001], and the average size decreases with increasing cobalt content. The crystallite morphology transforms from rod-like for the pure HAp to lamellae at the highest degree of Co substitution. The results of Rietveld refinement (symmetry, size and morphology of the crystallites) were confirmed by TEM and HRTEM analysis. © 2010 International Union of Crystallography. Printed in Singapore-all rights reserved.
PB  - Chester: International Union of Crystallography
T2  - Journal of Applied Crystallography
T1  - Crystal structure of cobalt-substituted calcium hydroxyapatite nanopowders prepared by hydrothermal processing
SP  - 320
EP  - 327
VL  - 43
IS  - 2
DO  - 10.1107/S0021889809051395
ER  - 
@article{
author = "Veselinović, Ljiljana and Karanović, Ljiljana and Stojanović, Zoran S. and Bračko, Ines and Marković, Smilja and Ignjatović, Nenad and Uskoković, Dragan",
year = "2010",
url = "http://dais.sanu.ac.rs/123456789/3428",
abstract = "A series of cobalt-exchanged hydroxyapatite (CoHAp) powders with different Ca/Co ratios and nominal unit-cell contents Ca10-x Cox (PO4)6(OH)2, x = 0, 0.5, 1.0, 1.5 and 2.0, were synthesized by hydrothermal treatment of a precipitate at 473 K for 8 h. Based on ICP (inductively coupled plasma) emission spectroscopy analysis, it was established that the maximum amount of cobalt incorporation saturated at 7sim;12 at.% under these conditions. The effects of cobalt content on the CoHAp powders were investigated using ICP emission spectroscopy, particle size analysis, transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) analyses as well as X-ray powder diffraction (XRPD) including Rietveld analysis. According to XRPD, all the materials are single-phase HAp and CoHAp of low crystallinity. Rietveld analysis shows that Co enrichment causes the c cell parameter to decrease at a faster rate than the a cell parameter. A microstructural analysis showed anisotropic X-ray line broadening due to crystallite size reduction. In CoHAp there is significant crystal elongation in [001], and the average size decreases with increasing cobalt content. The crystallite morphology transforms from rod-like for the pure HAp to lamellae at the highest degree of Co substitution. The results of Rietveld refinement (symmetry, size and morphology of the crystallites) were confirmed by TEM and HRTEM analysis. © 2010 International Union of Crystallography. Printed in Singapore-all rights reserved.",
publisher = "Chester: International Union of Crystallography",
journal = "Journal of Applied Crystallography",
title = "Crystal structure of cobalt-substituted calcium hydroxyapatite nanopowders prepared by hydrothermal processing",
pages = "320-327",
volume = "43",
number = "2",
doi = "10.1107/S0021889809051395"
}
Veselinović L, Karanović L, Stojanović ZS, Bračko I, Marković S, Ignjatović N, Uskoković D. Crystal structure of cobalt-substituted calcium hydroxyapatite nanopowders prepared by hydrothermal processing. Journal of Applied Crystallography. 2010;43(2):320-327
Veselinović, L., Karanović, L., Stojanović, Z. S., Bračko, I., Marković, S., Ignjatović, N.,& Uskoković, D. (2010). Crystal structure of cobalt-substituted calcium hydroxyapatite nanopowders prepared by hydrothermal processing.
Journal of Applied CrystallographyChester: International Union of Crystallography., 43(2), 320-327. 
https://doi.org/10.1107/S0021889809051395
Veselinović Ljiljana, Karanović Ljiljana, Stojanović Zoran S., Bračko Ines, Marković Smilja, Ignjatović Nenad, Uskoković Dragan, "Crystal structure of cobalt-substituted calcium hydroxyapatite nanopowders prepared by hydrothermal processing" 43, no. 2 (2010):320-327,
https://doi.org/10.1107/S0021889809051395 .

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