Relationship between oxide-ion conductivity and ordering of oxygen vacancy in the<i>Ln</i><sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>(<i>Ln</i>= La, Nd, Eu) system having a pyrochlore composition
Why this work is in the frame
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Bibliographic record
Abstract
The crystal structures of the Ln2Zr2O7 (Ln = La, Nd, Eu) systems having a pyrochlore-type composition were refined by the Rietveld analyses of the XRD data combined with MEM-based pattern fitting. All the samples showed a single phase of the pyrochlore-type structure. The oxide-ion conductivities of the present samples were discussed on the basis of the ordering of oxygen vacancy in the pyrochlore-type structure. The Rietveld analyses of XRD data showed that the degree of the oxygen 8b site occupancy at R.T. was estimated to be 0.0, 0.27 and 0.48 for La2Zr2O7, Nd2Zr2O7 and Eu2Zr2O7, respectively. The increase in the 8b site occupancy means the increase of incompleteness of the pyrochlore-type structure. The oxide-ion conductivity increased with increase in the 8b site occupancy which can be recognized to be a measure of the incompleteness of the pyrochlore-type structur. The oxide-ion conduction of Eu2Zr2O7 was ascribed to diffusion of oxygen along <100> direction, while the hole conduction of La2Zr2O7 occurred along <110> direction, according to the charge density map estimated by the MEM analysis.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it