Thermoelectric Properties of the New Polytelluride Ba<sub>3</sub>Cu<sub>14</sub><sub>-</sub><sub>δ</sub>Te<sub>12</sub>
Bibliographic record
Abstract
Ba 3 Cu 14 - δ Te 12 was prepared by directly reacting the elements in stoichiometric ratios at 800 °C for 3 days, followed by slow cooling. Ba 3 Cu 14 - δ Te 12 forms a new structure type, space group P 2 1 / m, with lattice dimensions of a = 11.909(2) Å, b = 21.174(4) Å, c = 11.983(2) Å, β = 117.071(4)°, and V = 2690.6(8) Å 3, for δ = 0.35(2) ( Z = 4). The structure contains corner-, edge-, and face-sharing CuTe 4 tetrahedra interconnected with almost planar CuTe 3 units. These connections result in a three-dimensional Cu atom network with numerous Cu−Cu bonds. With two Te 2 2 - dumbbells per formula unit, Ba 3 Cu 14 - δ Te 12 is an electron-precise compound when δ = 0, according to (Ba 2+ ) 3 (Cu + ) 14 (Te 2 2 - ) 2 (Te 2 - ) 8 . For δ > 0, the materials are degenerate semiconductors with moderate Seebeck coefficients and electrical conductivities, in accord with the electronic structure calculations, and exhibit extremely low thermal conductivity.
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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".