Revised ThO2‐Nb2O5 Phase Diagram

R. J. Cava, R. S. Roth, D. B. Minor

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3 Scopus citations


The phase equilibrium diagram of the system ThO2‐Nb2O was redetermined near the composition Th2Nb2O9. This phase was found to melt incongruenlly at 1362°C, with a eutectic temperature at ∼1350°C. The peritectic and eutectic compositions must occur between 60 and ∼64 mol % ThO2. From single crystal and powder X‐ray diffraction data, Th2 Nb2O9 was found to have a primitive monoclinic unit cell with a = 6.711(1), b = 25.254(5), c=7.757(1)×10−1nm, β=90.46 (1)°.

Original languageEnglish (US)
Pages (from-to)c‐64-c‐65
JournalJournal of the American Ceramic Society
Issue number4
StatePublished - Apr 1981
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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