Erratum: Stability and Solubility of Pollucite In the Granite System At 200 MPa H<sub>2</sub>O
Bibliographic record
Abstract
The chemistry and stability of pollucite (Pol, CsAlSi 2 O 6 )-leucite (Lct, KAlSi 2 O 6 )-analcime (Anl, NaAlSi 2 O 6 H 2 O) solid-solutions and the effects of added pollucite on phase relations in the haplogranite system were studied experimentally between 450 degrees and 850 degrees C at 200 MPa H 2 O. Addition of Cs via dissolution of pollucite lowers the haplogranite solidus by approximately 40 degrees C (to approximately 640 degrees C) and displaces the minimum melt composition slightly toward the Qtz apex. The Cs content of melt saturated in pollucite solid-solution near the minimum is approximately 5 wt.% Cs 2 O. There is substantial miscibility among Pol and Lct components at magmatic temperatures, but the Lct content of pollucite decreases linearly with decreasing temperature to zero Lct component at approximately 385 degrees C. The Lct and Anl components vary inversely in pollucite solid-solutions as a function of temperature, such that the Anl and maximum Pol components of the pollucite solid-solution increase with decreasing temperature. Natural and synthetic pollucite equilibrates readily with melt or with hydrothermal solutions (and coexisting alkali feldspars) down to temperatures below approximately 400 degrees C. The experiments do not unequivocally resolve a standing question of a miscibility gap in the Pol-Anl system at low temperature. The compositions of synthetic pollucite diverge by >15 mol.% in terms of Pol and Anl components at 450 degrees C, but as in nature, the bulk of the synthetic pollucite is intermediate in composition between the extremes.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.007 | 0.004 |
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".