Planar Tetracoordinate Silicon in Si <sub>3</sub> Cu <sub>3</sub> <sup>−</sup> Cluster
Bibliographic record
Abstract
Abstract Photoelectron spectroscopy and theoretical calculations have identified the global minimum structure of the 16‐valence electron Si 3 Cu 3 − cluster, which features a planar tetracoordinate silicon (ptSi) in a rhombic arrangement. The Si 3 and Cu 3 triangles are interconnected by a Si 2 /Cu 2 edge, forming an ordered chain‐like structure. Besides the conventional 2c–2e σ‐bond connecting Si 3 and Cu 3 , the stability of this cluster is reinforced by a delocalized 3c–2e σ‐bond in Cu 3 and a π‐bond in Si 3 . Our study provides experimental confirmation of a planar hypercoordinate heavier Group 14 element, opening possibilities for exploring similar structures in two‐dimensional materials.
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How this classification was reachedexpand
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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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 teacher head, 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".