Mechanism of Nanostructured Fluorapatite Formation from CaO, CaF<sub>2</sub> and P<sub>2</sub>O<sub>5</sub> Precursors by Mechanochemical Synthesis
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
We determined the mechanism of mechanochemical synthesis of fluorapatite from CaO, CaF 2 and P 2 O 5 by characterisation of the intermediate compounds. We used atomic absorption spectroscopy, X-ray diffraction, field emission scanning electron microscopy, FTIR spectroscopy and transmission electron microscopy to find the transitional compounds. Investigation of the binary and ternary powder mixtures revealed the appearance of H 3 PO 4 , Ca(OH) 2 , Ca 2 P 2 O 7 and CaCO 3 as the intermediate compounds. At early stages of the milling, conversions of P 2 O 5 to H 3 PO 4 and CaO to Ca(OH) 2 occurred in the wet atmosphere. Later, a combination of Ca(OH) 2 and H 3 PO 4 formed C a 2 P 2 O 7 while the unreacted CaO was converted to CaCO 3 by CO 2 of the ambient atmosphere. Spherical crystalline Ca 10 (PO 4 ) 6 F 2 particles formed after 48 hours of milling due to the reaction between Ca 2 P 2 O 7 , CaCO 3 and CaF 2 .
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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 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 | 0.001 | 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 it