Manganoarrojadite-(KNa), KNa<sub>5</sub>MnFe<sub>13</sub>Al(PO<sub>4</sub>)<sub>11</sub>(PO<sub>3</sub>OH)(OH)<sub>2</sub>, a new arrojadite-group mineral from the Palermo No. 1 mine, New Hampshire, USA
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 A new arrojadite-group mineral manganoarrojadite-(KNa), ideally KNa 5 MnFe 13 Al(PO 4 ) 11 (PO 3 OH)(OH) 2 , was found in a phosphate-bearing granite pegmatite at the Palermo No. 1 mine, New Hampshire, USA. It forms anhedral grains up to 1 × 1.5 cm in size combined in aggregates with vivianite, goyazite, quartz and calcite. The mineral is olive green with a pale green streak and vitreous to greasy lustre. The cleavage is good in one direction. The Mohs hardness is 4½. D calc is 3.53 g/cm 3 . Manganoarrojadite-(KNa) is optically biaxial (–), α = 1.658(2), β = 1.666(2), γ = 1.670(2), 2V meas. = 67(1)° and 2V calc. = 70° (589 nm). The infrared spectrum is reported. The composition (wt.%) is Na 2 O 6.97, K 2 O 1.78, CaO 0.31, MgO 2.17, MnO 12.30, FeO 31.17, Al 2 O 3 2.43, P 2 O 5 40.48, F 0.30, H 2 O 1.32, O = F 2 –0.13, total 99.10. The empirical formula calculated on the basis of 12 P and (O+OH+F) = 50 apfu is Na 4.73 K 0.80 Ca 0.12 Mg 1.13 Mn 2+ 3.65 Fe 2+ 9.13 Al 1.00 P 12.00 O 46.59 OH 3.08 F 0.33 . The ideal structural formula is A 1 K A 2 Na B 1 Na B 2 Na Na1,2 Na 2 Na3 □ C Mn M Fe 13 Al(PO 4 ) 11 (PO 3 OH) W (OH) 2 . The mineral is monoclinic, Cc , a = 16.5345(3), b = 10.0406(2), c = 24.6261(5) Å, β = 105.891(2)°, V = 3932.09(14) Å 3 and Z = 4. The strongest reflections of the powder X-ray diffraction pattern [ d ,Å( I )( hkl )] are: 5.902(24)(202), 5.025(24)(020), 3.208(47)(206, $\;\bar{1}$ 32), 3.048(100)( $\bar{5}$ 14, $\bar{4}$ 24), 2.758(24)( $\bar{6}$ 02) and 2.704(70)(226). The crystal structure, refined from single-crystal X-ray diffraction data ( R 1 = 0.025), is of the arrojadite structure type. Manganoarrojadite-(KNa) is the first arrojadite-group mineral with Mn dominant on the site usually occupied by Ca and without Ca as the dominant cation at any cation site.
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 | 0.002 | 0.003 |
| Meta-epidemiology (narrow) | 0.006 | 0.004 |
| Meta-epidemiology (broad) | 0.005 | 0.003 |
| Bibliometrics | 0.001 | 0.004 |
| Science and technology studies | 0.002 | 0.003 |
| Scholarly communication | 0.003 | 0.003 |
| Open science | 0.005 | 0.003 |
| Research integrity | 0.003 | 0.004 |
| Insufficient payload (model declined to judge) | 0.001 | 0.009 |
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