Details

Autor(en) / Beteiligte

• Mentre, O.
• Abraham, F.
• Deffontaines, B.
• Vast, P.

Titel

Structural study and conductivity properties of Ca1−xNa2xTi4(PO4)6 solid solution

Ist Teil von

• Solid state ionics, 1994-09, Vol.72, p.293-299

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

1994

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• A complete solid solution Ca1−xNa2xTi4(PO4)6 was prepared between CaTi4(PO4)6 and Na2Ti 4(PO4)6 belonging to the NASICON structural family. The space group evolves from R3 for x⪕0.5, to R3c for x>0.5. For each composition, conductivity values obey the Arrhenius law. From the two end members, cationic substitution improves the conductivity which reaches a maximum for x⋍0.5. The structure of CaTi4(PO4)6 was refined in the R3 space group applying the Rietveld method to the X- ray powder spectra. The Ca2+ cations and vacancies are ordered along the hexagonal c direction. A correlation is proposed between conductivity results and structural features.