HYDROGEN BONDING IN THE CRYSTAL STRUCTURE OF LEGRANDITE: Zn2(AsO4)(OH)(H2O)
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The crystal structure of legrandite -- Zn 2 (AsO 4 )(OH)(H 2 O), monoclinic, a 12.8052(3), b 7.9249(2), c 10.2173(2) A, β 104.4329(3)°, V 1004.13(6) A 3 , space group P 2 1 / c , Z = 2 -- has been refined to an R 1 value of 1.2% based on 2844 unique [| F o | > 4σ F ] reflections measured with a Bruker D8 three-circle diffractometer equipped with a rotating-anode generator (Mo K α X-radiation), multilayer optics, and an APEX-II detector. The legrandite structure is a heteropolyhedral framework of (AsO 4 ) tetrahedra, (Znφ 5 ) square pyramids, and (Znφ 6 ) octahedra [φ = O, (OH), (H 2 O)] with extensive hydrogen bonding across its interstices. All hydrogen positions were located, all hydrogen bonds were assigned, and the H...O distances are in reasonable accord with the published relation between O–H stretching frequency and H...O bond-length.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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 | 0.001 | 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 it