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Phase Diagram of LiF-Li3PO4 System: A New Mechanism of Heterovalent Anionic Isomorphism

Published online by Cambridge University Press:  28 December 2017

G.V. Zimina
Affiliation:
Moscow Technological University (Institute of Fine Chemical Technologies), Vernadskogo Avenue, 86, Moscow, 119571
M. Tsygankova
Affiliation:
Moscow Technological University (Institute of Fine Chemical Technologies), Vernadskogo Avenue, 86, Moscow, 119571
M. Sadykova*
Affiliation:
Moscow Technological University (Institute of Fine Chemical Technologies), Vernadskogo Avenue, 86, Moscow, 119571
F.M. Spiridonov
Affiliation:
Chemical Department, Lomonosov Moscow State University, Moscow119991, Russia
V.V. Fomichev
Affiliation:
Moscow Technological University (Institute of Fine Chemical Technologies), Vernadskogo Avenue, 86, Moscow, 119571
P.P. Fedorov
Affiliation:
Moscow Technological University (Institute of Fine Chemical Technologies), Vernadskogo Avenue, 86, Moscow, 119571 Prochorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russia
*
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Abstract

The phase diagram of LiF-Li3PO4 system is studied. The eutectic coordinates are 800±5°C, 8±1 mol% Li3PO4. A region of a solid solution based on lithium phosphate with a length of up to 11±2 mol% LiF was discovered. It is assumed that there is heterovalent isomorphism where anionic tetrahedron (PO4)3- is replaced by tetrahedron (LiF4)3-.

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Articles
Copyright
Copyright © Materials Research Society 2017 

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References

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