BOLEITE: RESOLUTION OF THE FORMULA, K Pb26 Ag9 Cu24 Cl62 (OH)48
Bibliographic record
Abstract
Abstract The crystal structure of boleite, K Pb26 Ag9 Cu24 Cl62 (OH)48, a 15.288(2) Å, V 3574(1) Å3, Pm 3̅m, Z = 1, has been refined to an R-index of 2.2% based on 884 observed (5σ) reflections collected with MoKα X-radiation. A new site was resolved, and site-scattering refinement showed it to be occupied by a scattering species with 19 epfu (electrons per formula unit); this result is in accord with complete occupancy of this site by K. Potassium was detected by electron-microprobe analysis, but the amount determined is only ~50% of the amount indicated by site-scattering refinement. However, the refinement results show K to be disordered within a large cage in the structure, and the electron-beam bombardment probably induces rapid migration of K within the structure. Infrared spectroscopy shows that there is no H2O present in the structure. The H-sites were determined during refinement, and a sensible H-bonding scheme results.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.017 | 0.004 |
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".