Transpassive Electrochemistry of Chalcopyrite Microparticles
Bibliographic record
Abstract
Most of the electrochemistry of chalcopyrite reported in the literature has been done using either massive samples of the mineral or carbon paste electrodes. Despite its importance, reports of the electrochemical behavior of this mineral carried on individual microparticles are scarce. In this work the microelectrochemistry of chalcopyrite is studied in sulfuric acid solutions, focusing the study on its behavior at transpassive potentials. It is shown that microparticles with sizes typically found in chalcopyrite concentrates (20 to 100 μm) can be leached to completion in less than 4 minutes at room conditions under the influence of 1.2 V (SCE). According to EDX analysis, atomic absorption spectroscopy and ICP, around 88% of the sulfur in the mineral is transformed into a compact layer of amorphous plastic sulfur, while the rest is transformed to sulphate. The plastic sulfur gradually equilibrates to more stable S8-rings orthorhombic phase. This nearly instantaneous dissolution of chalcopyrite opens the window to the development of new technologies.
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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 | 0.000 | 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) | 0.000 | 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 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".