Using Howardevansite Framework Adaptivity to Explore the Li<sub>2</sub>O–Fe<sub>2</sub>O<sub>3</sub>–V<sub>2</sub>O<sub>5</sub> Phase Diagram
Bibliographic record
Abstract
An iron vanadate in the Li 2 O–Fe 2 O 3 –V 2 O 5 ternary phase diagram was successfully synthesized by using β-Cu 3 Fe 4 (VO 4 ) 6 framework adaptivity. The three Cu 2+ ions in Howardevansite β-Cu 3 Fe 4 (VO 4 ) 6 were substituted by 1.5 Li + and 1.5 Fe 3+ to form Li 1.5 Fe 5.5 (VO 4 ) 6 . The structure was determined based on single-crystal X-ray diffraction data, which showed that it crystallizes in the triclinic P 1̅ space group. The structure consists of zigzag chains formed of iron octahedra and distorted trigonal bipyramids running along the [10–1] direction and connected into a 3D framework by the VO 4 tetrahedra. The framework can accommodate Li + ions. Magnetic susceptibility revealed the presence of high spin Fe 3+ ions in the material. Li 1.5 Fe 5.5 (VO 4 ) 6 was tested in electrochemistry and can reversibly insert up to 5.5 Li + ions, with a theoretical capacity of 146 mA h/g, making it a suitable insertion positive electrode material. During galvanostatic discharge, a maximum capacity of 128 mA h/g and a reversible capacity of 78 mA h/g were obtained after 100 cycles at C/10.
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.
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) | 0.000 | 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 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".