REFINEMENT OF THE CRYSTAL STRUCTURE OF VAYRYNENITE
Why this work is in the frame
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Bibliographic record
Abstract
Vayrynenite, (Mn2+0.78Fe2+0.23Mg0.01)Be(PO4)(OH0.92F0.08), is monoclinic, a 5.4044(6), b 14.5145(12), c 4.7052(6) A, β 102.798(9)°, V 359.91(7) A3, space group P 21/ a , Z = 4. The structure was refined to an R index of 1.5% based on 1001 observed [| F o| > 5σ F ] for reflections measured with Mo K α X-radiation using a single-crystal diffractometer. In the structure of vayrynenite, (Beφ4) tetrahedra connect to adjacent (Beφ4) tetrahedra by corner-sharing of anions in a zigzag pattern to form a chain that extends in the a direction. This chain is decorated along its periphery by (PO4) tetrahedra that corner-share with one O atom from each of two different (Beφ4) tetrahedra to form ribbons along the c axis. These [Be2(OH)2(PO4)2]n4n− ribbons, which somewhat resemble the [Be2(OH)2(SiO4)2] chains in euclase, AlBe(SiO4)(OH), are linked in the b direction by (Mn2+,Fe2+) in octahedral coordination. The resultant (001) sheets are linked to adjacent sheets in the c direction by corner-sharing of O atoms between (PO4) tetrahedra and {(Mn,Fe) φ6}octahedra, and by hydrogen bonds. The hydrogen position was determined directly, and a sensible hydrogen-bonding scheme established. The connectivity of the (Beφ4– T φ4) ( T = Si,P) chains in Be minerals is examined, and arranged in a hierarchy of increasing topological complexity.
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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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 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