EXSOLUTION IN NIOBIAN RUTILE FROM THE PEGMATITE DEPOSIT AT GREENBUSHES, AUSTRALIA
Why this work is in the frame
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Bibliographic record
Abstract
Niobian rutile (Ti 4+ 0.63 Nb 5+ 0.14 Fe 2+ 0.11 Ta 5+ 0.08 Fe 3+ 0.02 W 6+ 0.01 Sn 4+ 0.003)� 0.99 O2 from the Greenbushes granitic pegmatite, Western Australia, contains lamellae (~5 � 50 � m in size) of disordered ferrocolumbite (Fe 2+ 0.80 Mn 2+ 0.12 Ti 4+ 0.07)� 0.99 (Nb 5+ 1.48 Ta 5+ 0.28 Ti 4+ 0.13 W 6+ 0.09 Sn 4+ 0.01)� 1.99 O6. The lamellae apparently formed by exsolution from the original rutile-like phase, which is supported by several features, most notably by the fixed structural orientation of lamellae with respect to the host phase. Singlecrystal X-ray diffraction shows that ferrocolumbite lamellae are present in four orientations, with the reciprocal axis cfcl* of each approximately parallel to one of the rutile directions [101]*, [011]*, [ ‐ [0 ‐ 11]*. The ferrocolumbite a* axes are strictly parallel to the ±a1* and ±a2* axes of rutile, whereas bfcl* is not parallel to any rational reciprocal direction of rutile. This may be the first documented case where the mutual crystallographic orientation between host rutile and a precipitate of disordered ferrocolumbite has been determined. Weak reflections corresponding to a ferrocolumbite supercell with a triple a indicate the presence of ordered ferrocolumbite in what appears to be a parallel orientation with the disordered ferrocolumbite.
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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 | 0.001 | 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) | 0.001 | 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