Kochite, a new member of the rosenbuschite group from the Werner Bjerge alkaline complex, East Greenland
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Bibliographic record
Abstract
Kochite, ideally Na 2 (Na,Ca) 4 Ca 4 (Mn,Ca) 2 Zr 2 Ti 2 (Si 2 O 7 ) 4 (O,F) 4 F 4 , is a new member of the rosenbuschite group from the alkaline complex of Werner Bjerge, East Greenland. It occurs in nepheline syenite as lath-shaped to acicular crystals in aggregates up to 0.3 × 1.0 mm. Associated minerals are nepheline, alkali feldspar and lavenite. It is transparent with a brownish colour and has a vitreous lustre. It is brittle with a perfect {100} cleavage and an uneven fracture. The mineral is biaxial positive with α 1.684 ± .002, β 1.695 ± .004, γ 1.718 ± .002 and 2 V meas. = 73°(2). The optical orientation is X = c and Z Λ [100] ∼ 20°. The pleochroism is weak with X = colourless and Z = pale yellow. The mineral is triclinic with a = 10.032(2), b = 11.333(2), c = 7.202(1) A, α = 90.192(4), β = 100.334(5), γ = 111.551(4) °, Z = 1. The 5 strongest X-ray lines are [ d in A (Int.)] 2.908(10), 2.600(8), 3.028(6), 1.868(6) and 1.670(5). An average of four electron microprobe analyses of kochite gave SiO 2 31.55, Al 2 O 3 0.05, V 2 O 3 0.03, TiO 2 8.44, ZrO 2 12.12, HfO 2 0.09, Nb 2 O 5 1.86, Ta 2 O 5 0.02, MgO 0.01, MnO 4.92, FeO 1.08, CaO 21.39, SrO 0.12, Na 2 O 10.33, Y 2 O 3 0.39, La 2 O 3 0.25, Ce 2 O 3 0.57, F 6.83, O ≡ F 2.88, total 97.71 wt.%. The empirical formula, based on 8 Si atoms in accordance with the structure refinement ( R ( F ) = 4.0 %), is (Na 1.70 Sr 0.02 )∑ 1.72 (Na 2.77 Ca 1.23 )∑ 4.00 (Ca 3.40 Na 0.60 )∑ 4.00 (Mn 1.06 Ca 0.82 Y 0.05 Ce 0.05 La 0.02 )∑ 2.00 (Zr 1.40 Fe 0.23 Ca 0.36 Hf 0.01 )∑ 2.00 (Ti 1.61 Nb 0.21 Zr 0.10 Al 0.05 V 0.03 )∑ 2.00 (Si 2 O 7 ) 4 F 4 (O 2.39 F 1.48 )∑ 3.87 . D meas. = 3.32, D calc. = 3.31 g/cm 3 . Kochite is an Mn − , Ti-analogue of rosenbuschite.
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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 | 0.001 | 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 it