Phase formation in the ScPO4-Na3PO4-Li3PO4 ternary system

The 950°C isothermal section of the ScPO 4 -Na 3 PO 4 -Li 3 PO 4 three-component system was plotted and studied; one-, two-, and three-phase fields were bounded. Three solid solution fields exist in the title system: one based on LiNa 5 (PO 4 ) 2 complex phosphate (olympite structure), another on sc...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2009-12, Vol.54 (12), p.1992-1997
Main Authors: Zimina, G. V., Zhuravleva, M. A., Smirnova, I. N., Spiridonov, F. M., Novoselov, A. V., Il’inskii, A. L.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Physicochemical Analysis of Inorganic Systems
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Summary:The 950°C isothermal section of the ScPO 4 -Na 3 PO 4 -Li 3 PO 4 three-component system was plotted and studied; one-, two-, and three-phase fields were bounded. Three solid solution fields exist in the title system: one based on LiNa 5 (PO 4 ) 2 complex phosphate (olympite structure), another on scandium-stabilized high-temperature Na 3 PO 4 phase Na 3(1 − x ) Sc x /3 □ 2/3 x PO 4 (space group Fm 3 m ), and the third on Na 3 Sc 2 (PO 4 ) 3 (NASICON structure). All phases found in the title system are derivatives of phases that exist in its subsystems. Lithium-for-sodium isovalent substitutions in Na 3 Sc 2 (PO 4 ) 3 considerably increase the NASICON-type solid solution field but negatively influence the conductivity of the phase.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023609120250