Kozłowskiite, ideally Ca<sub>4</sub>Fe<sup>2+</sup>Sn<sub>3</sub>(Si<sub>2</sub>O<sub>7</sub>)<sub>2</sub>(Si<sub>2</sub>O<sub>6</sub>OH)<sub>2</sub>, a new kristiansenite-type mineral from Szklarska Poręba, Lower Silesia, Poland
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Kozłowskiite, ideally Ca 4 (Fe 2+ Sn 3 )(Si 2 O 7 ) 2 (Si 2 O 6 OH) 2 , is a new mineral isostructural with kristiansenite and silesiaite, found as a band in the core of a zoned silesiaite–kristiansenite crystal from the granitic pegmatite at Szklarska Poręba, Lower Silesia, Poland. In tiny pieces kozłowskiite is pale brownish, with a calculated density of 3.775 g⋅cm –3 and a mean refractive index ~1.727. The triclinic crystal structure was determined with space-group symmetry C 1: a = 10.0183(2), b = 8.3861(1), c = 13.3395(2) Å, α = 89.956(1), β = 109.039(2), γ = 89.979(1)° and V = 1059.40(3) Å 3 , although, similarly to kristiansenite, it is metrically monoclinic (Laue group 2/ m ) with α and γ angles equal to 90° and a = 10.0170(3), b = 8.3860(2), c = 13.3421(4) Å, β = 109.050(3)° and V = 1059.40(5) Å 3 . The seven strongest reflections in the calculated powder X-ray diffraction pattern are [d in Å ( I ) hkl ]: 5.190 (73.2) 111, 1 $\bar{1}$ 1; 4.569 (30.0) $\bar{2}$ 02; 3.153 (64.7) 004; 3.094 (28.1) $\bar{3}$ 11, $\bar{3}\bar{1}$ 1; 3.089 (100) $\bar{2}\bar{2}$ 2, $\bar{2}$ 22; 2.595 (27.2) 2 $\bar{2}$ 2, 222; and 2.141 (30.6) $\bar{3}$ 31, $\bar{3}\bar{3}$ 1. Electron microprobe analysis gave (in wt.%) SiO 2 39.46, ZrO 2 0.35, SnO 2 31.13, Al 2 O 3 0.35, Sc 2 O 3 2.65, total Fe as Fe 2 O 3 5.06 (= Fe 2 O 3calc. 2.26; FeO calc. 2.52), MnO 0.71, CaO 18.42 and H 2 O calc. 1.48, sum 99.33. The empirical formula on the basis of 26O + 2(OH) and 16 cations ( Z = 2) is Ca 4.00 (Sn 2.52 Sc 0.47 Fe 2+ 0.43 Fe 3+ 0.34 Mn 2+ 0.12 Al 0.08 Zr 0.03 ) Σ4.00 (Si 2.00 O 7 ) 2 (Si 2.00 O 6 OH) 2 . The crystal structure of kozłowskiite was refined to an R 1 = 2.12% for 4887 reflections with I o>2σ I . The Ca and Si sites are occupied solely by Ca and Si, respectively, and three of four M sites: M 2, M 3 and M 4, are dominated by Sn. Four hydrogen atoms present in the kozłowskiite unit cell are shared among the O17–O27 and O47–O37 oxygen atoms where O17 and O47 are OH groups forming relatively strong hydrogen bonds.
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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 | 0.005 | 0.004 |
| Meta-epidemiology (narrow) | 0.011 | 0.010 |
| Meta-epidemiology (broad) | 0.011 | 0.005 |
| Bibliometrics | 0.004 | 0.009 |
| Science and technology studies | 0.006 | 0.004 |
| Scholarly communication | 0.005 | 0.004 |
| Open science | 0.008 | 0.007 |
| Research integrity | 0.006 | 0.010 |
| Insufficient payload (model declined to judge) | 0.001 | 0.007 |
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