New Ferroelectric Ba<sub>5</sub>Ti<sub>2</sub>O<sub>7</sub>Cl<sub>4</sub>
Bibliographic record
Abstract
A new crystalline material grown by the flux method and identified chemically and through density and structure determination as Ba5Ti2O7Cl4 has been synthesized, and is shown to possess ferroelectric properties. The structure is found to be orthorhombic at room temperature using powder method of X-ray diffraction. The lattice constants at room temperature are a=8.526 Å, b=7.608 Å and c=11.696 Å with an uncertainty of ±0.0025 Å. The crystal has a space group Pmc21, and the atomic positions are shown to confirm with the observed X-ray reflection intensities. It is found that two lattices related to each other by the interchange of a and b axes describe the crystal structure, and the X-ray intensities can be explained by considering the ions present on both the lattices for a given (h k l) plane. The use of the atomic scattering factors available in literature give the correct X-ray intensities, if the microstructure present in the crystal in the form of pronounced twinnings on planes (100), (200), (010), (020), (001), (020), (110), (220) is taken into account. The calculations are done using trial and error method anticipating the atomic positions.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".