Skip to main content
padlock icon - secure page this page is secure

Ionic Substitutions in Biphasic Hydroxyapatite and -Tricalcium Phosphate Mixtures: Structural Analysis by Rietveld Refinement

Buy Article:

$52.00 + tax (Refund Policy)

The structural information on the influence of ionic additions in biphasic (hydroxyapatite (HAP) and -tricalciumphosphate (-TCP)) mixtures ranging from single ionic substitutions to combined ionic substitutions of most of the essential ions embedded in biological apatite was analyzed through the Rietveld refinement technique. The results have proved that the determined quantitative phase composition of HAP and -TCP in biphasic mixtures was dependent on the initial calcium (Ca) deficiency of the precursor powders precipitated from the different molar concentrations used in the synthesis. The substitution of cations (Na+, Mg2+, and K+) improved the stabilization of the -TCP structure whereas anions (F and Cl) were found incorporated at the OH site of the HAP phase. Rietveld analysis of X-ray powder diffraction data from the present study proved to be a powerful technique to describe the position and occupancy of certain ions like Mg2+ and Cl in the biphasic mixtures. However, it has also shown limitations in tracking back other ions like Na+, K+, and F, which require the use of other complementary characterization methods.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Affiliations: 1: Department of Ceramics and Glass Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal 2: Institute of Geology and Mineralogy, University of Erlangen-Nuremberg, 91054 Erlangen, Germany

Publication date: January 1, 2008

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more