TOPOLOGICAL ENUMERATION OF DECORATED [Cu2+ 2]N SHEETS IN HYDROXY-HYDRATED COPPER-OXYSALT MINERALS
Bibliographic record
Abstract
Many hydroxy-(hydrated) Cu 2+ oxysalt minerals, particularly Cu 2+ sulfates, are based on structural units that are variants of the [ M ϕ 2 ] N sheets of edge-sharing octahedra, where M is an octahedrally coordinated cation (including vacancies) and ϕ is an anion. Where ϕ = O 2− ,OH,Cl,H 2 O, the sheet can be considered as a simple sheet; where ϕ = (SO 4 ) 2− , the sheet may be considered as a decorated sheet. In such structures, Cu 2+ ϕ 6 octahedra show strong axial elongation; Cu 2+ –ϕ(equatorial) bonds have a bond-valence of ~0.42 vu , and Cu 2+ –ϕ(apical) bonds have a bond-valence of ~0.17 vu. Local bond-valence requirements dictate that an (SO 4 ) 2− group can only link to a [Cu 2+ ϕ 2 ] N sheet if three Cu 2+ –ϕ(apical) bonds are incident to the linking anion. This constraint provides considerable restrictions on possible structural arrangements with small unit-cells ( 2+ atoms/plane). These may be derived by two-coloring the 6 3 net. There are currently 20 minerals known that correspond to this structural theme, and it is almost certain that many others await discovery.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".