Kreiterite, CsLi2Fe+3(Si4O10)F2, a New Cesium Mica from the Darai-Pioz Alkaline Massif, Tajikistan
Bibliographic record
Abstract
Abstract Kreiterite, CsLi2Fe+3(Si4O10)F2, a new cesium trioctahedral mica was discovered in the Darai-Pioz alkaline massif (Tajikistan). It is named after the Russian geologist, Prof. Vladimir Mikhailovich Kreiter (1897–1966). Kreiterite occurs as lamellar grains or flakes up to 0.2 mm across, irregular in shape and usually slightly deformed, in quartz-pectolite aggregates within so-called “quartz lumps”, the rocks consisting mainly of granular quartz. The mineral is colorless and transparent with vitreous luster. Mohs hardness is 2½, Dmeas. is 3.33(2) g/cm3, and Dcalc. is 3.342 g/cm3. The new mineral is optically biaxial (−) with α = 1.596(2), β = 1.605(2), γ = 1.607(2), 2V(calc) = −50°. It is monoclinic, space group C2/m, C2, or Cm (polytype 1M), a = 5.240(2) Å, b = 9.054(4) Å, c = 10.767(4) Å, β = 99.58(4)°, V = 503.4(6) Å3, and Z = 2. The strongest lines in the powder diffraction pattern are (d Å, I %, hkl): 4.49, 31, (1 1 0); 3.94, 31, (1 1 1); 3.70, 47, ( 1 2), ( 2); 3.45, 36, (0 2 2); 3.00, 34, ( 1 ), ( 3); 2.652, 17, (0 0 4); 2.610, 72, ( 0 1), (1 3 0), ( 3 0); 2.583, 100, (2 0 0), ( 3 1); 2.241, 38, (2 2 0); 2.190, 67, ( 3 3). Chemical analysis by electron microprobe and SIMS (for H2O and Li2O) gave SiO2 47.37, TiO2 0.99, Al2O3 0.29, MgO 0.40, Fe2O3 13.18, ZnO 0.12, K2O 0.02, Cs2O 27.37, Li2O 5.90, H2O 1.28, F 4.77, −O=F −2.01, total 99.68 wt.% The empirical formula, based on 12 (O+F), is Cs0.99Li2.01(Fe3+0.84Ti0.06Mg0.05Al0.03Zn0.01)Σ0.99Si4.01O10(F1.28OH0.72)Σ2. Kreiterite is a ferric-iron analogue of sokolovaite and gorbunovite and the lithium ferric-iron analogue of garmite.
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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 | 0.000 | 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 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
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".