Thermal annealing of metamict titanite: A synchrotron radiation and optical birefringence study
Bibliographic record
Abstract
The thermal annealing behaviour of metamict titanite from Cardiff, Canada, which shows moderate structural damage from the a-decay of radiogenic elements (U, Th) has been studied using single-crystal synchrotron radiation and optical-birefringence techniques. Progressive and isothermal annealing experiments yield a temperature-dependent response in the diffraction and optical signals. The low-temperature regime (< 673 K) is characterized by a preferred annealing of Frenkel-defects which results in small changes of the unit-cell volume and the Bragg-intensities on a time-scale of several hours. On constant heating at higher temperatures, metamict titanite displays two-stage kinetics with most rapid effects during the first two hours of annealing and less significant changes after the initial annealing period. Fast annealing of Frenkel defects occurs first, followed by recrystallization of more damaged regions. Single-crystal studies reveal lower temperatures for pronounced annealing effects than previously reported in powder-diffraction studies (ca. 100 K).
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How this classification was reachedexpand
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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.005 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".