Unique Barium Selenostannate−Selenide: Ba<sub>7</sub>Sn<sub>3</sub>Se<sub>13</sub> (and Its Variants Ba<sub>7</sub>Sn<sub>3</sub>Se<sub>13</sub><sub>-</sub><sub>δ</sub>Te<sub>δ</sub>) with SnSe<sub>4</sub> Tetrahedra and Isolated Se Anions
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The new selenostannate−selenide Ba 7 Sn 3 Se 13 and its quaternary substitution variants Ba 7 Sn 3 Se 13 - δ Te δ were prepared from the elements at 900 °C followed by slow cooling to 200 °C. Ba 7 Sn 3 Se 13 crystallizes in the orthorhombic space group Pnma, with lattice parameters of a = 12.748(1) Å, b = 24.891(3) Å, c = 9.212(1) Å, and V = 2923.0(5) Å 3 ( Z = 4). The structure motifs include Ba 2+ cations, isolated SnSe 4 tetrahedra, and isolated Se 2 - anions that are not bonded to any Sn atom. Partial Se/Te replacements are possible up to 2.24(2) of the 13 Se atoms, and the Te atoms prefer the naked site, surrounded by six Ba 2+ cations, as well as the site with the longest Se−Ba distances. The Se/Te substitution leads to a smaller band gap as computed with the LMTO approximation, which becomes visible by the gradual darkening of the red color with increasing Te content.
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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 | 0.003 |
| Meta-epidemiology (narrow) | 0.012 | 0.013 |
| Meta-epidemiology (broad) | 0.012 | 0.003 |
| Bibliometrics | 0.003 | 0.007 |
| Science and technology studies | 0.006 | 0.006 |
| Scholarly communication | 0.006 | 0.008 |
| Open science | 0.008 | 0.006 |
| Research integrity | 0.009 | 0.007 |
| Insufficient payload (model declined to judge) | 0.001 | 0.002 |
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