The Stability of Hydrated Aluminium Phosphate, ALPO<sub>4</sub>·1.5H<sub>2</sub>O
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 dissolution mechanism and stability of a synthetic hydrated aluminium phosphate, AlPO4 x 1.5H20 (AlPO4-H3) was investigated at 22 degrees C over the pH range 2.4 to 8.8. AlPO4 x 1.5H2O was found to be more soluble than the better known dihydrate (variscite, AIPO4 x 2H2O) hence proving to be metastable. This material was determined to undergo incongruent dissolution at pH around 3.0 and higher producing initially amorphous Al(OH)3 which gradually (within 30-day dissolution period) converted to the stable gibbsite phase. Upon evaluation of the experimental data with PHREEQC it was possible to calculate the solubility product ( logKsp ) and the standard Gibbs free energy of formation (deltaGf,0) for AlPO4 x 1.5H2O to be respectively-- 20.46+/-0.40 and -1980.5+/-.0 kJ mol(-1) at 22 degrees C.
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 | 0.001 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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