Introduction of carbonate in the rare earth-containing oxyapatite
| Autor: | G. Bonel, J.L. Lacout, M. Mikou |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Materials science
Degree (graph theory) Infrared Rare earth Inorganic chemistry chemistry.chemical_element Crystal structure Condensed Matter Physics Electronic Optical and Magnetic Materials Ion Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Vacancy defect Materials Chemistry Ceramics and Composites Lanthanum Carbonate Physical and Theoretical Chemistry |
| Zdroj: | Journal of Solid State Chemistry. 86:323-326 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/0022-4596(90)90149-r |
| Popis: | The lanthanum-containing oxyapatite, Ca{sub 10-x}La{sub x}(PO{sub 4}){sub 6}O{sub 1+x/2}, treated in a CO{sub 2} atmosphere at 950{degree}C can be partially carbonated if x < 2; it remains uncarbonated when x = 2. The general formula of the carbonated apatites is Ca{sub 10-x}La{sub x}(PO{sub 4}){sub 6}O{sub x}(CO{sub 3}){sub 1-x/2}. The number of La{sup 3+} and O{sup 2{minus}} ions on the one hand and the number of CO{sup 2{minus}}{sub 3} ions and vacancies on the other hand are equal; each O{sup 2{minus}} ion is joined to a close La{sup 3+} ion, and each CO{sup 2{minus}}{sub 3} ions is next to a vacancy. |
| Databáze: | OpenAIRE |
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