Academic Journal
Isomorphous Substitutions of Rare Earth Elements for Calcium in Synthetic Hydroxyapatites
| العنوان: | Isomorphous Substitutions of Rare Earth Elements for Calcium in Synthetic Hydroxyapatites |
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| المؤلفون: | Ardanova, Lyudmyla I., Get’man, Eugeni I., Loboda, Stanislav N., Prisedsky, Vadim V., Tkachenko, Tatiana V., Marchenko, Valeriy I., Antonovich, Valeriy P., Chivireva, Nataliya A., Chebishev, Konstantin A., Lyashenko, Alexandra S. |
| المصدر: | Biochemistry, Chemistry and Geology Department Publications |
| بيانات النشر: | A Collection of Scholarly and Creative Works for Minnesota State University, Mankato |
| سنة النشر: | 2010 |
| المجموعة: | Minnesota State University, Mankato: Cornerstone |
| مصطلحات موضوعية: | calcium, rare earth elements, isomorphous substitution, synthetic hydroxyapatites, Inorganic Chemistry |
| الوصف: | Polycrystalline hydroxyapatites Ca10−xREEx(PO4)6(OH)2−xOx were synthesized and studied by X-ray powder diffraction, infrared absorption, diffuse-reflectance spectroscopy, and thermogravimetry. The solubility limits xmax of rare earth elements (REE) in Ca hydroxyapatites decreases with an increasing REE atomic number from xmax = 2.00 for La, Pr, and Nd to xmax = 0.20 for Yb at 1100 °C. Refinements of X-ray diffraction patterns by the Rietveld method show that REE atoms substitute for Ca preferentially at the Ca(2) sites of the apatite structure. The substitution decreases the Ca(2)−O(4) atomic distances in the calcium coordination polyhedra and increases the Ca(2)−O(1,2,3) distances. This observation shows that interatomic distances depend not only on radii of the ions involved in the substitution but also on their charges. |
| نوع الوثيقة: | text |
| اللغة: | unknown |
| Relation: | https://cornerstone.lib.mnsu.edu/chem_geol_fac_pubs/3; http://doi.org/10.1021/ic1015127 |
| DOI: | 10.1021/ic1015127 |
| الاتاحة: | https://cornerstone.lib.mnsu.edu/chem_geol_fac_pubs/3 https://doi.org/10.1021/ic1015127 |
| رقم الانضمام: | edsbas.E385966C |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/ic1015127 |
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