<sup>17</sup> O NMR Spectroscopy of α‐TeO <sub>2</sub> and Na <sub>2</sub> TeO <sub>3</sub>
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Bibliographic record
Abstract
The synthesis of 17 O‐enriched α‐tellurite (α‐TeO 2 ) is described. TeO 2 is obtained stochiometrically by the reaction of tellurium isopropoxide with 17 O‐enriched H 2 O. The reaction is mild and simple and opens the field of tellurite‐based ceramics to 17 O nuclear magnetic resonance spectroscopy. We also report the first 17 O nuclear magnetic resonance spectra of α‐TeO 2 and Na 2 TeO 3 . Their isotropic chemical shifts, δ iso , are 180 ppm and 158 ppm, respectively, and their quadrupolar coupling parameters are C Q =7.48 MHz and η=0.43 for α‐TeO 2 , and C Q =6.63 MHz and η=0.33. By using extended Hückel tight binding calculations, we interpret the chemical shifts of tetravalent inorganic oxide network formers (SiO 2 , GeO 2 , and TeO 2 ) in terms of the local paramagnetic shielding effect. We also show that this is the predominant effect in determining the chemical shifts of non‐bridging oxide sites in this type of network.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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