CRYSTAL CHEMISTRY OF URANYL MOLYBDATES. IX. A NOVEL URANYL MOLYBDATE SHEET IN THE STRUCTURE OF Tl2[(UO2)2O(MoO5)]
Bibliographic record
Abstract
Crystals of a new thallium uranyl molybdate, Tl 2 [(UO 2 ) 2 O(MoO 5 )], have been synthesized by high-temperature solid-state reactions. The structure [monoclinic, P 2 1 / n , a 8.2527(3), b 28.5081(12), c 9.1555(4) A, β 104.122(1)°, V 2088.91(15) A 3 , Z = 8] was solved by direct methods and refined to R 1 = 0.039 ( wR 2 = 0.081) on the basis of 8609 unique reflections. The structure is novel in that Mo 6+ cations occur in both tetragonal pyramidal and trigonal bipyramidal coordination environments, and it contains a uranyl molybdate sheet of composition [(UO 2 ) 2 O(MoO 5 )] with more uranium than molybdenum. The uranyl molybdate sheets are composed of Ur O 5 ( Ur : uranyl ion, UO 2 2+ ) pentagonal bipyramids and MoO 5 polyhedra that are linked by the sharing of edges. Within the sheet, eight Ur O 5 bipyramids share edges, resulting in a Z-shaped complex that is oriented approximately parallel to [010]. The MoO 5 polyhedra each contain one O atom that is not shared within the sheet; these are oriented both up and down relative to the plane of the sheet. The anion topology of the sheet consists of pentagons, squares and triangles. In the sheet, all pentagons are populated by U, four-fifths of the squares contain Mo, and the triangles are empty. The uranyl molybdate sheets are parallel to (101) and are linked via Tl + cations located in the interlayer.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 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 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".