Low-Dimensional Organically Templated Uranium Fluorides (C<sub>5</sub>H<sub>14</sub>N<sub>2</sub>)<sub>2</sub>U<sub>2</sub>F<sub>12</sub>·2H<sub>2</sub>O and (C<sub>2</sub>H<sub>10</sub>N<sub>2</sub>)U<sub>2</sub>F<sub>10</sub>: Hydrothermal Syntheses, Structures, and Magnetic Properties
Why this work is in the frame
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Bibliographic record
Abstract
Two new organically templated U(IV) fluorides, (C 5 H 14 N 2 ) 2 U 2 F 12 ·2H 2 O ( AU1-1 ) and (C 2 H 10 N 2 )U 2 F 10 ( AU2-1 ), have been prepared from the reaction of UO 3 with HF and homopiperazine (C 5 H 12 N 2 ) at 200 °C in aqueous media. These compounds have been characterized by single-crystal X-ray diffraction, elemental analysis, and magnetic susceptibility measurements. Crystallographic data: AU1-1, monoclinic, space group P 2 1 / c, a = 9.272(4) Å, b = 12.314(4) Å, c = 18.475(7) Å, β = 90.32(3)°, Z = 4; AU2-1, monoclinic, space group C 2/ c, a = 16.038(8) Å, b = 7.131(3) Å, c = 8.782(4) Å, β = 91.75(4)°, Z = 4. AU1-1 consists of face-sharing UF 9 tricapped trigonal prisms that form one-dimensional chains that further hydrogen-bond with diprotonated homopiperazine and water molecules. AU2-1 forms, in part, from the cleavage of homopiperazine to yield diprotonated ethylenediamine, which serves to template the formation of uranium fluoride layers. These layers consist of edge- and corner-sharing UF 9 tricapped trigonal prisms. The variable-temperature magnetic susceptibility of AU1-1 is consistent with antiferromagnetic interactions between U(IV) centers, with μ eff (300 K) = 4.37 μ B /f.u. and θ = −1.3 K. The magnetization of AU1-1 at 2 K displays an irreversible metamagnetic-like transition at H c = 3.60 T. The magnetic susceptibility for AU2-1 (μ eff (300 K) = 4.58 μ B /f.u.) with θ = +21 K suggests the presence of weak ferromagnetic interactions within the [U 2 F 10 ] 2 - layers.
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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 | 0.009 | 0.006 |
| Meta-epidemiology (narrow) | 0.020 | 0.022 |
| Meta-epidemiology (broad) | 0.018 | 0.006 |
| Bibliometrics | 0.003 | 0.007 |
| Science and technology studies | 0.008 | 0.012 |
| Scholarly communication | 0.007 | 0.008 |
| Open science | 0.011 | 0.006 |
| Research integrity | 0.014 | 0.013 |
| Insufficient payload (model declined to judge) | 0.002 | 0.003 |
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