THE CRYSTAL STRUCTURE OF ARGENTOJAROSITE, AgFe3(SO4)2(OH)6
Bibliographic record
Abstract
Nous avons affine la structure cristalline de l'argentojarosite naturelle, dont la formule ideale est AgFe 3 (SO 4 ) 2 (OH) 6 , a 7.3398(7), c 16.538(3) A, V 771.4(2) A 3 , groupe spatial R3m, Z= 3, jusqu'a un residu R 1 de 2.8% sur une base de 307 reflexions uniques mesurees avec rayonnement MoKa et un diffractometre automatise a quatre cercles. Le taux d'occupation du site A indique qu'il est completement rempli par les atomes Ag, avec des longueurs de liaison Ag-O et Ag-OH de 2.963 et 2.721 A, respectivement, et un volume icosaedrique du polyedre AgO 6 (OH) 6 de 57.71 A 3 . Tandis que l'Ag + dans l'argentojarosite est sense avoir une coordinence de 12, et par consequent un rayon ionique entre 1.48 et 1.56 A, nos resultats font penser que le rayon ionique est plutot 1.35-1.36 A, plus pres de la valeur attendue pour une coordinence de neuf. Par consequent, la sphere de coordinence de l'Ag + dans l'argentojarosite serait probablement intermediaire entre six et douze. Une coordinence de 12 n'est pas etablie pour l'argent dans d'autres mineraux, et il y a de fortes chances que les courbes publiees pour evaluer les valences de liaison ne s'appliquent pas a cette coordinence de l'argent.
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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 | 0.000 |
| 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) | 0.002 | 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".