A whole new family of perovskite-based structures
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The complex and often non-linear structural response of framework structures to changes in pressure, temperature, and especially composition (e.g. the plateau effect), is due to the delicate balance of forces between the framework components of strongly-bonded polyhedra and the interactions between the framework and extra-framework species. For example, we have previously shown [1] that whether the tilts of the octahedra in perovskites increase or decrease with increasing pressure depends on the relative strength of the bonding between the framework and the extra-framework cation compared to the strength of the cation-oxygen bonds within the octahedra. Feldspars are far more structurally complex than perovskites and have previously resisted the challenge of quantifying their behaviour in this way. However, Megaw (1974) showed [2] that the rigid-unit deformations of the tetrahedral framework of feldspars can be decomposed in to four tilts of the four tetrahedra that comprise the 4-rings that lie parallel to (010). Of these four tilts Megaw showed that only two, an outward tilt of the T2 tetrahedra and a wrinkle of the 4-ring, change significantly between different alkali feldspars. Analysis of the high-pressure and high-temperature data now available, from both experiment and DFT calculations, confirms that these are the dominant tilt mechanisms. In particular, we have found that changes in the wrinkle tilt are responsible for changes in the length of the feldspar crankshaft, and are thus responsible for 70% of the volume change of alkali feldspars with P, T, or composition.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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