Amorphization and post-amorphous phases of NaA Zeolite at high P–T conditions
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Bibliographic record
Abstract
Hydrated NaA (hyd-NaA) and dehydrated NaA (deh-NaA) zeolites were studied at high P–T conditions (up to 4.5 GPa and 400 °C) by ex situ X-ray powder diffraction and in situ impedance spectroscopy. At compression of both synthetic zeolites in 1000-ton cubic press, the amorphization was observed in a wide pressure range at room T. At heating to 200–250 °C and compression to 2–3 GPa, a complete amorphous material was obtained from deh-NaA. After amorphization at high P–T, hyd-NaA zeolite transforms to new crystalline phases: carnegieite and nepheline. These amorphous-to-crystalline transformations in a low pressure range suggest the correlation of short-scale order parameters in both materials. The presence of water in hyd-NaA essentially changes the phase diagram. Phase transformations in zeolites may be studied by in situ impedance spectroscopy. Unusual ionic AC conductivity of hyd-NaA, characterized by high value and the Cole–Cole plot with broken line without any semicircle, was observed. The pressure range of high-conducting state increases with temperature and may be broader the measured interval of 0.8–4.5 GPa at 400 °C.
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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) | 0.005 | 0.000 |
Machine scores (provisional)
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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