Cámaraite, Ba<sub>3</sub>NaTi<sub>4</sub>(Fe<sup>2+</sup>,Mn)<sub>8</sub>(Si<sub>2</sub>O<sub>7</sub>)<sub>4</sub>O<sub>4</sub>(OH,F)<sub>7</sub>. I. A new Ti-silicate mineral from the Verkhnee Espe Deposit, Akjailyautas Mountains, Kazakhstan
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Cámaraite, ideally Ba 3 NaTi 4 (Fe 2+ ,Mn) 8 (Si 2 O 7 ) 4 O 4 (OH,F) 7 , is a new mineral from the Verkhnee Espe deposit, Akjailyautas Mountains, Kazakhstan. It occurs as intergrowths with bafertisite and jinshajiangite in separate platy crystals up to 8 mm × 15 mm × 2 mm in size, or as star-shaped aggregates of crystals with different orientations. Individual crystals are orange-red to brownish-red, and are platy on {001}. Cámaraite is translucent and has a pale-yellow streak, a vitreous lustre, and does not fluoresce under cathode or ultraviolet light. Cleavage is {001} perfect, no parting was observed, and Mohs hardness is <5; the mineral is brittle. The calculated density is 4.018 g cm -3 . In transmitted light, camaraite is strongly pleochroic, X = light brown, Y = reddish-brown, Z = yellow- brown, with Z < X < Y. Cámaraite is biaxial +ve and 2V meas . = 93(1)°. All refractive indices are greater than 1.80. Cámaraite is triclinic, space group C , a = 10.678(4) Å, b = 13.744(8) Å, c = 21.40(2) Å, α = 99.28(8)°, β = 92.38(5)°, γ = 90.00(6)°, V = 3096(3) Å 3 , Z = 4, a:b:c = 0.7761:1:1.5565. The seven strongest lines in the X-ray powder-diffraction pattern are as follows: [ d (Å), ( I ), ( hkl )]: 2.63, (100), (401); 2.79, (90), ( 3, 41, 2 6, 225); 1.721, (70), ( 11, 49, 0 2); 3.39, (50), (2 4, 223); 3.18, (50), ( 5, 24); 2.101, (50), ( 2, 40); 1.578, (50), ( 1, 2, 6 1, 40). Chemical analysis by electron microprobe gave: Nb 2 O 5 1.57, SiO 2 25.25, TiO 2 15.69, ZrO 2 0.33, Al 2 O 3 0.13, Fe 2 O 3 2.77, FeO 16.54, MnO 9.46, ZnO 0.12, MgO 0.21, CaO 0.56, BaO 21.11, Na 2 O 1.41, K 2 O 0.84, H 2 O 1.84, F 3.11, less O:F 1.31, total 99.63 wt.%, where the valence state of Fe was determined by Mössbauer spectroscopy [Fe 3+ /(Fe 2+ + Fe 3+ ) = 0.13(8)] and the H 2 O content was derived by crystal-structure determination. The resulting empirical formula on the basis of 39 anions is Ca 0.05 ) Σ7.78 Si 7.97 O 35.89 H 3.88 F 3.11 . Cámaraite is a Group-II TS-block mineral in the structure hierarchy of Sokolova (2006). The mineral is named camaraite after Fernando Cámaraite (born 1967) of Melilla, Spain, in recognition of his contribution to the fields of mineralogy and crystallography. The new mineral and mineral name have been approved by the Commission on New Minerals, Nomenclature and Classification, International Mineralogical Association (IMA 2009-11).
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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 | 0.009 |
| Meta-epidemiology (broad) | 0.010 | 0.005 |
| Bibliometrics | 0.003 | 0.008 |
| Science and technology studies | 0.005 | 0.005 |
| Scholarly communication | 0.006 | 0.005 |
| Open science | 0.009 | 0.005 |
| Research integrity | 0.006 | 0.008 |
| Insufficient payload (model declined to judge) | 0.000 | 0.006 |
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