Magnesiohögbomite-6<i>N</i>12<i>S</i>, Mg<sub>5</sub>Al<sub>11</sub>TiO<sub>23</sub>(OH), a new högbomite-group mineral from the DeWitts Corners, Ontario, Canada
Bibliographic record
Abstract
Abstract The new högbomite-group mineral magnesiohögbomite-6 N 12 S , ideally Mg 5 Al 11 TiO 23 (OH), was found in calcite “vein-dikes” at the DeWitts Corners occurrence, lots 10 and 11, concession 1, Bathurst Township, Ontario, Canada. It forms tabular and short-prismatic crystals up to 5 mm in size. The major forms are pinacoid {0001} and hexagonal pyramid {11 ${\bar 2}$ 1}, sometimes modified by hexagonal prism {11 ${\bar 2}$ 0}. The associated minerals are magnesiohögbomite-2 N 3 S , spinel, corundum, diopside, magnesio-hastingsite, pargasite, clinochlore and calcite. Magnesiohögbomite-6 N 12 S is dark brown to black with brown streak and vitreous lustre. It has no cleavage and its fracture is uneven. The Mohs hardness is 6½. D calc is 3.87 g/cm 3 . The infrared spectrum is reported. The composition (wt.%) is MgO 13.09, ZnO 0.46, FeO 11.91, Fe 2 O 3 6.84, Al 2 O 3 62.70, TiO 2 4.44, H 2 O 0.99, total 100.43. The empirical formula calculated on the basis of 17 cations, excluding H + , is (Mg 2.95 Fe 2+ 1.51 Al 0.49 Zn 0.05 ) Σ5 (Al 10.71 Fe 3+ 0.78 Ti 0.51 ) Σ12 O 23 (OH). The simplified formula is (Mg,Fe) 5 (Al,Fe,Ti) 12 O 23 (OH). The mineral is trigonal, R ${\bar 3}$ m, a = 5.7194(2), c = 83.069(5) Å, V = 2353.3(2) Å 3 and Z = 6. The strongest reflections of the powder X-ray diffraction pattern [ d ,Å( I )(hkl)] are: 2.921(26)(0.1.23), 2.863(49)(110), 2.687(29)(0.1.26), 2.547(31)(0.1. $\overline{28}$ ) and 2.434(100)(1.1.18). The crystal structure was solved and refined from single-crystal X-ray diffraction data to R 1 = 0.022. It is composed of alternating spinel ( S ) and nolanite ( N ) modules in the sequence 3 × ( NSSNSS) . The sequence of cubic ‘ c ’ and hexagonal ‘ h ’ closed-packed oxygen layers is 3 × ( cccccchcccch ). It is the first polysome in the högbomite supergroup with such a sequence.
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How this classification was reachedexpand
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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 itClassification
machine, unvalidatedMachine predicted; both teacher heads agree on what is shown here.
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".