Sr2B5O9OH{middle dot}H2O, A SYNTHETIC BORATE RELATED TO HILGARDITE
Bibliographic record
Abstract
The crystal structure of a new strontium borate, Sr 2 B 5 O 9 OH·H 2 O, space group C 2, a 10.2571(6), b 8.0487(2), c 6.4043(4) A, β 127.860(2)°, Z = 2, has been determined by X-ray diffraction using a single crystal grown under hydrothermal conditions. The structure is closely related to that of the zeolite-like hilgardite minerals, Ca 2 B 5 O 9 Cl·H 2 O, in particular that of triclinic hilgardite-1 A . The main structural differences are a more symmetrical conformation of the [B 5 O 12 ] 9− pentaborate chains and a random distribution of OH − and H 2 O in Sr 2 B 5 O 9 OH·H 2 O, that result in the monoclinic symmetry. The role of the Sr cations in determining the conformation of the pentaborate chain is discussed by comparison with hilgardite-1 A .
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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".