Table 2 |
|||
|
Rietveld refinement results of synchrotron XRD data collected at λ = 1.2348 Å |
|||
|
Heat-treatment temperature (°C) |
600 |
700 |
800 |
|
|
|||
|
Crystal structure |
Orthorhombic |
Orthorhombic |
Orthorhombic |
|
Space group |
Amm2 |
Amm2 |
Amm2 |
|
Unit cell dimensions |
|||
|
a (Å) |
4.004135 |
4.006313 |
4.007833 |
|
b (Å) |
5.737700 |
5.726862 |
5.724034 |
|
c (Å) |
5.742700 |
5.736795 |
5.734393 |
|
Atomic coordinates |
X |
Y |
Z |
|
O1(4d) |
0 |
0.254 |
0.285 |
|
O2(2b) |
0.500 |
0 |
0.021 |
|
K (2b) |
0.500 |
0 |
0.517 |
|
Nb (2a) |
0 |
0 |
0 |
|
|
|||
|
Rwp of all samples was < 10%. |
|||
|
Chen et al. Nanoscale Research Letters 2011 6:530 doi:10.1186/1556-276X-6-530 |
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