DEHYDRATION AND CRYSTALLIZATION REACTIONS OF SECONDARY SULFATE MINERALS FOUND IN MINE WASTE: IN SITU POWDER-DIFFRACTION EXPERIMENTS
Bibliographic record
Abstract
A sample stage and a control system have been developed to vary the humidity and temperature of the atmosphere surrounding a powder sample during an X-ray-diffraction experiment. The use of this stage and a position-sensitive detector creates the oppor-tunity to conduct experiments that determine the stability fields and reaction mechanisms of related sulfates of different states of hydration, such as melanterite, siderotil and rozenite. The sample is dusted onto a zero-background plate, and this small amount of dispersed sample ensures maximum interaction among all of the crystallites of the sample and the atmosphere. Determination of the phase boundary for the dehydration of melanterite to rozenite is compared to that determined by Chou et al. (2002). The rate of dehydration of cuprian melanterite to cuprian siderotil is shown to depend on the relative humidity in the chamber, which is consistent with a diffusion-controlled process. Rozenite is observed to form by very rapid dehydration of cuprian melanterite. The crystallization of melanterite from liquid under controlled humidity is demonstrated.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 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 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".