Natromelansonite, Na<sub>3</sub>Zr[Si<sub>7</sub>AlO<sub>19</sub>]⋅4–5H<sub>2</sub>O, a new member of the rhodesite mero-plesiotype series from Mont Saint-Hilaire, Quebec, Canada
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract Natromelansonite, Na 3 Zr[Si 7 AlO 19 ]⋅4–5H 2 O, was found at the Poudrette (Demix) quarry, Mont Saint-Hilaire, Quebec, Canada in a highly altered pegmatite together with a clay mineral, steacyite, polylithionite and rhodochrosite. It occurs as an outer zone of tabular crystals to 0.1 × 0.3 × 1 mm in size flattened on (001). The inner zone is made of melansonite. The mineral is grey with white powder colour and vitreous lustre. The cleavage is parallel to {010}, perfect. The Mohs hardness is 3.5. The mineral has green fluorescence under short-wave ultraviolet light. The D calc is 2.31 g/cm 3 . The infrared spectrum is reported. The composition (wt.%, average of 8 analyses) is Na 2 O 10.08, K 2 O 1.72, CaO 0.24, BaO 0.32, MnO 0.10, Al 2 O 3 6.86, Y 2 O 3 0.35, Yb 2 O 3 0.55, SiO 2 56.23, ZrO 2 14.78, H 2 O 9.52, total 100.75. The empirical formula calculated on the basis of O = 23 apfu and H = 8 apfu is Na(□Na 0.38 Ca 0.02 Mn 0.01 ) 2 (Na 0.70 K 0.28 Ba 0.02 ) Σ1.00 (Zr 0.91 Y 0.02 Yb 0.02 ) Σ0.95 (Si 7.08 Al 1.02 ) Σ8.10 O 19 ⋅4H 2 O. The mineral is monoclinic, P 2 1 /m , a = 6.5156(3) Å, b = 24.061(1) Å, c = 6.9759(6) Å, β = 90.453(5)° and V = 1093.61(9) Å 3 and Z = 2. The strongest reflections of the powder X-ray diffraction pattern [ d ,Å( I )( hkl )] are: 12.02(100)(020), 6.97(89)(001), 6.51(39)(100), 3.416(37)(160), 3.062(42)( $\bar{1}$ 61, 102, 161 and $\bar{1}$ 12), 3.018(38)(230 and 042), 2.864(40)(240 and 132). The crystal structure, solved and refined from single-crystal X-ray diffraction data ( R 1 = 0.042), is based on a double sheet of tetrahedra (T) and a sheet of octahedra (O) that alternate along the [010] direction forming a TOT structure typical for members of the rhodesite mero-plesiotype series.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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 it