EXSOLUTION AND BREAKDOWN OF SCANDIAN AND TUNGSTENIAN Nb Ta Ti Fe Mn PHASES IN NIOBIAN RUTILE
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
Niobian rutile commonly exsolves titanian ferrocolumbite to manganocolumbite or ixiolite with elevated contents of Nb, Mn and Sc, W or Sn, but further breakdown of the exsolved phase has not been reported to date. Niobian rutile from Eptevann, southern Norway, exsolved titanian-scandian phase E1 of the A3+BO4 type, which subsequently broke down to a (Sc,Mn)-en-riched and U-depleted phase E2 (11 to 12.8 wt. % Sc2O3), a Ti-rich but (Sc,Mn,U)-poor phase E3, and a (U,Y)-rich but (Ti,Sc,Mn)-depleted, metamict and hydrous phase X (2.5 to 3 wt. % UO2). Niobian rutile from Ilmen Mountains, Russia, exsolved a (Ti,U)-poor, Mn-rich tungstenian ixiolite (10 to 14 wt. % WO3), which subsequently broke down into a Ti-poor but W-rich phase (~30 wt. % WO3) and a U-enriched but W-depleted mineral (~6 wt. % WO3, 0.7 to 1.5 wt. % UO2). The second-stage breakdown of the exsolved phases reflects the metastable nature of these minerals, which feature disordered populations of divalent to hexavalent cations in an exclusively octahedral array of oxygen anions, with consequent long-range disorder and local imbalances of electro-static charges. Under low-temperature conditions, insufficient for further exsolution and ordering, the exsolved phases readily respond to the action of aqueous fluids by breakdown to more cation-selective phases. However, incomplete separation of differ-ent categories of cations and non-integral stoichiometries of the products suggest that they did not attain equilibrium.
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 | 0.000 |
| 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 it