CRYSTAL CHEMISTRY OF URANYL MOLYBDATES. III. NEW STRUCTURAL THEMES IN Na6[(UO2)2O(MoO4)4], Na6[(UO2)(MoO4)4] AND K6[(UO2)2O(MoO4)4]
Bibliographic record
Abstract
Two Na uranyl molybdates, Na6[(UO2)2O(MoO4)4] and Na6[(UO2)(MoO4)4], and one K uranyl molybdate, K6[(UO2)2O(MoO4)4], have been synthesized by high-temperature solid-state reactions of mixtures of Na2CO3, K2CO3, UO3 and MoO3. All three structures were solved by direct methods and refined on the basis of F2 for all unique data collected with monochromatic MoK X-radiation and a CCD (charge-coupled device) detector. The structure of Na6[(UO2)2O(MoO4)4] was refined to an agreement factor (R1) of 4.1%, calculated using the 1969 unique observed reflections (Fo ≥ 4F), and a goodness-of-fit (S) of 1.06. It is triclinic, space group P¯1, a 7.637(2), b 8.164(2), c 8.746(2) Å, 72.329(5), 79.364(5), 65.795(4)°, V 472.7(2) Å3, Z = 1. The structure of Na6[(UO2)(MoO4)4] was refined to an R1 of 3.3%, calculated using the 3268 unique
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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 | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".