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 language||English (US)|
|Journal||Journal of the American Ceramic Society|
|State||Published - Jan 1 1981|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry