Complex Crystal Chemistry of Yb<sub>6</sub>(CuGa)<sub>50</sub> and Yb<sub>6</sub>(CuGa)<sub>51</sub> Grown at Different Synthetic Conditions
Bibliographic record
Abstract
Two new compounds in the Yb–Cu–Ga system were discovered. Yb 6 (CuGa) 50 was obtained as single crystals grown from gallium metal flux, and Yb 6 (CuGa) 51 was synthesized by high-frequency induction heating technique. Structure analysis reveals new structure type for Yb 6 (CuGa) 50 ( C 2/ m space group), while Yb 6 (CuGa) 51 crystallizes in rhombohedral space group R 3̅ m adopting the Th 2 Zn 17 structure type. Both structures could be derived from the simplest layered packing, through CaCu 5 -type structure, as a common parent. Physical properties of the Yb 6 (CuGa) 51 sample obtained bulk quantity were explored. The magnetic susceptibility study of Yb 6 (CuGa) 51 in the temperature range of 2–300 K suggests a valence fluctuation at lower temperatures. X-ray absorption near edge spectroscopy suggests that Yb exists in mixed-valent state in Yb 6 (CuGa) 51 . Electrical resistivity measurement reveals that Yb 6 (CuGa) 51 is metallic in nature and shows Fermi-liquid behavior in the temperature range from 3.5 to 25 K.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".