THE CRYSTAL STRUCTURE OF COBALTARTHURITE FROM THE BOU AZZER DISTRICT, MOROCCO: THE LOCATION OF HYDROGEN ATOMS IN THE ARTHURITE STRUCTURE-TYPE
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Bibliographic record
Abstract
The crystal structure of cobaltarthurite, ideally Co2+Fe3+2(AsO4)2(OH)2·4H2O, monoclinic, P 21/ c , a 10.2635(9), b 9.7028(8), c 5.5711(5) A, β 94.2070(10)°, from Khder, Bou Azzer district, Morocco, has been refined to R 1 = 1.8%, wR 2 = 6.4% using1343 unique [ F o > 4σ ( F o)] reflections collected with a Bruker 1K SMART Platform CCD diffractometer and Mo K α radiation. This is the best determination of the structure of an arthurite-group mineral yet obtained, and for the first time has allowed the determination of hydrogen positions. The hydrogen bonding scheme proposed in previous studies on arthurite-group minerals is confirmed with one change.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 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 it