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Study of the system V205—Na20. I. Phase diagram of the system V205-NaV03

V. Daněk, J. Balajka, and K. Matiašovský

Institute of Inorganic Chemistry, Slovak Academy of Sciences, 809 34 Bratislava

 

Abstract: The phase diagram of the V205-NaV0 system was re-examd. by thermal and x-ray analyses. The congruently melting compd. 2Na2O.17V2O5 and the incongruently melting compd. 2Na2O.5V2O5 are formed. The former compd. is a V bronze and releases O on solidification. In the partial system V2O5-2Na2O.17V2O5, a eutectic exists at 653° and compn. NaVO3 3 and V2O6 97%. In the partial system 2Na2O.17V2O5-NaVO3, a peritectic exists at 581° with compn. V2O5 39 and NaVO3 61% and a eutectic point exists at 541° with compn. NaVO3 71 and V2O5 29%.

Full paper in Portable Document Format: 276a748.pdf

 

Chemical Papers 27 (6) 748–751 (1973)

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