Table 1 Fitting parameters and results for 2400 ppm Cr-doped UO2 calcined oxide powder and sintered pellet samples.
From: Cr2+ solid solution in UO2 evidenced by advanced spectroscopy
UO2 + 2400 ppm Cr (Calcined oxide powder) | UO2 + 2400 ppm Cr (Sintered pellet) | |
|---|---|---|
S02 | 0.90 | 0.90 |
∆Eo | −0.80(2) | −6.0(15) |
N (Cr-O1) | 4 | 4.5 |
Reff (Cr-O1) | 2.10* | 2.10*^ |
R(Cr-O1) | 2.00(1) | 2.00(1) |
σ2 (O1) | 0.0010(6) | 0.005(1) |
α (%) | 100.0 | 100.0 |
N (Cr-O2) | 3 | 1.5 |
Reff (Cr-O2) | 2.94* | 2.17′ |
R(Cr-O2) | 2.95(2) | 2.44(2) |
σ2 (O2) | 0.004(3) | 0.002(2) |
α (%) | 99.6 | 100.0 |
N (Cr-U1) | 4 | 3 |
Reff (Cr-U1) | 3.49* | 3.49*^ |
R(Cr-U1) | 3.58(4) | 3.40(7) |
σ2 (U1) | 0.017(6) | 0.014(8) |
α (%) | 85.7 | 100.0 |
N (Cr-U2) | 2 | 1 |
Reff (Cr-U2) | 3.81* | 3.40* |
R(Cr-U2) | 3.85(6) | 3.34(5) |
σ2 (U2) | 0.010(7) | 0.004(3) |
α (%) | 79.1 | 100.0 |
N (Cr-U3) | – | 2 |
Reff (Cr-U3) | – | 3.81*^ |
R(Cr-U3) | – | 3.91(2) |
σ2 (U3) | – | 0.001(1) |
α (%) | – | 100.0 |
R-factor | 0.019 | 0.013 |
Bond valence sum (O1) | 1.94 | 2.14 |
Bond valence sum (O2) | 0.11 | 0.22 |
Bond valence sum (total) | 2.05 | 2.35 |
