Ionic conductivity of the Na1+xM
x
III
Zr2?x(PO4)3 systems (M = Al,Ga, Cr,Fe, Sc,In, Y,Yb) |
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Authors: | J M Winand A Rulmont P Tarte |
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Affiliation: | (1) University of Liège, Institute of Chemistry, B-4000 Sart-Tilman par Liège, 1, Belgium |
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Abstract: | The existence and ionic conductivity of solid solutions Na1+xM
x
III
Zr2–x(PO4)3 with Nasicon-like structure have been investigated and the results compared with literature data. A limited range of solid solutions is formed with MIII = aluminium, gallium, yttrium, ytterbium, whereas a continuous series is obtained for MIII = chromium, iron, scandium, indium. The pure end member Na3ln2(PO4)3 is reported for the first time; according to powder diffraction data, it is hexagonal witha = 0.8966(1) andc = 2.2104(4) nm. The small monoclinic distortion already known for MIII = chromium, iron and scandium is restricted tox values very close to 2. Ionic conductivity measurements show that for a given value ofx, the mobility of the Na+ ions is strongly influenced both by the ionic radius and the type of electronic structure of the MIII ion. However, no simple correlation can be found. |
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Keywords: | |
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