Garmite, CsLiMg2(Si4O10)F2, a New Mica-Group Mineral from “Quartz Blocks” of the Darai-Pioz Alkaline Massif, Tajikistan
Bibliographic record
Abstract
Abstract A new trioctahedral mica garmite, CsLiMg2(Si4O10)F2, a Cs analogue of tainiolite, was found in an substantially quartz rock in the Darai-Pioz alkaline massif, Rasht district (formerly Garm district), Central Tajikistan, and was named after the town Garm, an administrative center of the Rasht district. It is closely associated with Mn-bearing pectolite, aegirine, Sr-rich fluorite, quartz, datolite, and polylithionite. Garmite forms lamellae up to 0.2 mm across and up to 0.02 mm thick. The mineral is transparent, colorless, with perfect, mica-like cleavage on (001). The Moh’s hardness is 2.5; micro-indentation hardness VHN20 = 90 kg/mm2. Dmeas = 3.34(2) and Dcalc = 3.336 g/cm3. Garmite is optically biaxial (–), 2Vmeas = –10(5)°, α = 1.582(2), β = 1.601(2), γ = 1.602(2). The chemical composition (electron microprobe, Li and H by SIMS, wt %): SiO2 47.39, Al2O3 0.71, TiO2 0.71, Nb2O5 0.12, FeO 2.12, MnO 0.85, MgO 9.01, ZnO 2.23, K2O 0.16, Cs2O 26.98, Li2O 3.57, H2O 0.08, F 7.23, –O=F2 3.04, total 99.90. The empirical formula calculated on the basis of 12 (O + F) apfu is (Cs0.95K0.02)Σ0.97Li1.21(Mg1.37Zn0.16Fe0.15Al0.07Mn0.06Ti0.04)Σ1.85Si3.99O10.04(F1.92OH0.04)Σ1.96. Garmite is monoclinic, space group C2/m, C2 or Cm; polytype 1M. The unit-cell parameters are a = 5.234(2), b = 9.042(4), c = 10.780(4) Å, β = 99.73(4)°; V = 502.8(6) Å3; Z = 2. The strongest reflections of the powder X‑ray diffraction pattern (d Å, I, hkl) are 4.48, 35, 110; 3.70, 70, –112; 3.45, 44, 022; 2.608, 70, –201, 130; 2.580, 100, 200, –131; 2.241, 45, 220; 2.187, 80, –133. The holotype specimen is deposited in the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow catalogue no. 95894.
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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 | 0.000 | 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) | 0.001 | 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 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".