THE CRYSTAL STRUCTURE OF SYNTHETIC GRIMSELITE, K3Na[(UO2)(CO3)3](H2O)
Bibliographic record
Abstract
Crystals of grimselite, K3Na[(UO2)(CO3)3](H2O), were synthesized by room-temperature evaporation of an aqueous solu-tion. The structure of grimselite is hexagonal, a 9.302(2), c 8.260(3) Å, V 618.9(3) Å3, space group P¯62c, Z = 2. The crystal structure was refined on the basis of F2 for all 546 unique reflections measured using MoK X-radiation and a CCD-based detector to an R1 of 2.55%, calculated using the 459 unique observed reflections with Fo ≥ 4F. Consistent with other uranyl carbonates with a U: C ratio of 1: 3, the structure of grimselite contains the uranyl tricarbonate cluster [(UO2)(CO3)3], which consists of a uranyl hexagonal bipyramid that shares three equatorial edges with (CO3) triangles. The uranyl tricarbonate clusters are oriented perpendicular to [001] and are interconnected through bonds to Na and K polyhedra.
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How this classification was reachedexpand
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 | 0.000 | 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 | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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 teacher head, 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".