Revised ThO2-Nb2O5 Phase Diagram |
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| Authors: | R J Cava &#; R S Roth &#; D B Minor |
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| Affiliation: | National Bureau of Standards, Washington, D.C. 20234 |
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| Abstract: | 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)°. |
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