NEPTUNYL COMPOUNDS: POLYHEDRON GEOMETRIES, BOND-VALENCE PARAMETERS, AND STRUCTURAL HIERARCHY
Why this work is in the frame
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Bibliographic record
Abstract
The structures of 59 inorganic Np 5+ and Np 6+ neptunyl compounds are examined and placed within a structural hierarchy, with special attention to the relationships of these structures with U 6+ uranyl compounds. Forty-three Np 5+ neptunyl compounds containing square, pentagonal and hexagonal bipyramids have structural units consisting of isolated polyhedra (2), finite clusters of polyhedra (1), chains of polyhedra (12), sheets of polyhedra (16), and frameworks of polyhedra (12). Cation–cation interactions occur in 18 of these, resulting in a dramatic departure of their topologies from those of U 6+ uranyl compounds. Compounds with cation–cation interactions have structural units consisting of chains (4), sheets (4) and frameworks (10) of polyhedra. Those Np 5+ compounds that lack cation–cation interactions exhibit topologies that are similar or identical to those of U 6+ compounds. Sixteen Np 6+ neptunyl compounds have structural units consisting of isolated polyhedra (1), finite clusters of polyhedra (3), chains of polyhedra (4), and sheets (8) of polyhedra. None of these structures exhibit cation–cation interactions, and their topologies are similar to U 6+ uranyl compounds. Geometries of Np 5+ and Np 6+ polyhedra are examined, and updated bond-valence parameters, R o = 2.035 and b = 0.422, are provided for Np 5+ .
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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 | 0.000 | 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 | 0.000 | 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