Sb<sub>2</sub>(TeO<sub>4</sub>)(SO<sub>4</sub>): An Anhydrous Tellurite Sulfate with Large Birefringence and Enhanced Thermal Stability
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Bibliographic record
Abstract
The birefringence of birefringent materials is positively correlated with structural anisotropy. By introducing 5 s 2 -electron-containing Sb 3+ and Te 4+ cations into a sulfate system, the anhydrous antimony tellurite sulfate Sb 2 (TeO 4 )(SO 4 ) was obtained. Due to the stereochemically active lone pairs (SCALPs), both Sb 3+ and Te 4+ cations are four-coordinated with O atoms to form the distorted seesaw-shaped units. Benefiting from the strong polarizability anisotropy of the distorted polyhedra, Sb 2 (TeO 4 )(SO 4 ) exhibits a large birefringence, as well as wide transparency range and high thermal stability, making the compound a potential UV birefringent material. Structural and theoretical calculations indicate that the optical properties mainly originate from the highly distorted SO 4 and TeO 4 units and their uniform alignment. This work will provide some useful insights into the development of SCALP-cation-based birefringent crystals.
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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 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| 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