Rare-Earth Gallium Antimonides La<sub>13</sub>Ga<sub>8</sub>Sb<sub>21</sub> and <i>RE</i><sub>12</sub>Ga<sub>4</sub>Sb<sub>23</sub> (<i>RE</i> = La−Nd, Sm): Linking Sb Ribbons by Ga<sub>6</sub>-Rings or Ga<sub>2</sub>-Pairs
Bibliographic record
Abstract
The ternary rare-earth gallium antimonides La 13 Ga 8 Sb 21 and RE 12 Ga 4 Sb 23 ( RE = La−Nd, Sm) have been synthesized through reaction of the elements. The structures of La 13 Ga 8 Sb 21 (hexagonal, space group - P 6/ mmm, Z = 1, a = 17.657(2) Å, c = 4.3378(7) Å) and Pr 12 Ga 4 Sb 23 (orthorhombic, space group - Immm, Z = 2, a = 4.2612(3) Å, b = 19.4070(13) Å, c = 26.3972(18) Å) have been determined by single-crystal X-ray diffraction. Both structures contain groupings of RE 6 trigonal prisms that extend as columns through sharing of the triangular faces. Isolated trigonal planar GaSb 3 units result from centering adjacent trigonal prisms by Ga or Sb atoms. Channels outlined by Sb square ribbons linked through Ga−Ga bonding enclose the triangular assemblies of trigonal prisms. The Ga−Ga bonding is manifested as Ga 6 -rings in La 13 Ga 8 Sb 21 but as Ga 2 -pairs in Pr 12 Ga 4 Sb 23 . Structural relationships are described between La 13 Ga 8 Sb 21 and Ba 0.8 Hf 12 As 17.7, and between Pr 12 Ga 4 Sb 23 and La 6 MnSb 15 .
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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 | 0.004 | 0.001 |
| Meta-epidemiology (narrow) | 0.009 | 0.010 |
| Meta-epidemiology (broad) | 0.007 | 0.004 |
| Bibliometrics | 0.001 | 0.006 |
| Science and technology studies | 0.005 | 0.004 |
| Scholarly communication | 0.004 | 0.005 |
| Open science | 0.006 | 0.003 |
| Research integrity | 0.005 | 0.010 |
| Insufficient payload (model declined to judge) | 0.001 | 0.003 |
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; both teacher heads agree on what is shown here.
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".