Flux Synthesis, UV–vis Absorbance, and Magnetism of Cesium Copper Silicates with an Isolated Super-Super Exchange Spin Dimer in Cs<sub>6</sub>Cu<sub>2</sub>Si<sub>9</sub>O<sub>23</sub>
Bibliographic record
Abstract
Single crystals of four new cesium copper silicates were grown from CsCl/CsF flux. [CsCs 4 Cl][Cu 2 Si 8 O 20 ] is a salt-inclusion compound that crystallizes in space group P 4/ m with lattice parameters a = 12.2768(3) Å and c = 8.6470(2) Å; Cs 6 Cu 2 Si 9 O 23 crystallizes in space group P 2 1 / n with lattice parameters a = 15.0763(9) Å, b = 6.9654(4) Å, c = 26.9511(17) Å, and β = 99.240(2)°; Cs 8 Cu 3 Si 14 O 35 crystallizes in space group C 2/ c with a = 39.2236(13) Å, b = 6.9658(2) Å, c = 14.9115(5) Å, and β = 97.1950(10)°; and Cs 2 CuSi 3 O 8 is a member of the stuffed tridymite family and crystallizes in a monoclinic distortion of the CsAlSiO 4 structure type with space group C 2/ m and a = 12.8587(3) Å, b = 5.38510(10) Å, c = 9.0440(2) Å, and β = 133.2580(10)°. All four compounds contain CuO 4 -flattened tetrahedra. The degree of flattening can be correlated with the UV–vis spectra. Cs 6 Cu 2 Si 9 O 23 exhibits spin dimer magnetism that can be attributed to super-super-exchange between two Cu(II) ions connected by a silicate tetrahedron. The other three compounds all show paramagnetic behavior down to 2 K.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 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".