Relianceite-(K), a new phosphate–oxalate mineral related to davidbrownite-(NH<sub>4</sub>) from the Rowley mine, Arizona, USA
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Bibliographic record
Abstract
Abstract Relianceite-(K), K 4 Mg(V 4+ O) 2 (C 2 O 4 )(PO 3 OH) 4 (H 2 O) 10 , is a new mineral species from the Rowley mine, Maricopa County, Arizona, USA. It occurs in an unusual bat-guano-related, post-mining assemblage of phases. Other secondary minerals associated with relianceite-(K) are antipinite, dendoraite-(NH 4 ), fluorite, mimetite, mottramite, rowleyite, salammoniac, struvite, vanadinite, willemite, wulfenite and at least one other new mineral. Crystals of relianceite-(K) are sky blue prisms up to ~0.1 mm in length. The streak is very pale blue and lustre is vitreous, Mohs hardness is 2½, tenacity is brittle and fracture is splintery. The calculated density is 2.111 g⋅cm –3 . Relianceite-(K) is optically biaxial (+) with α = 1.528(2), β = 1.529(2), γ = 1.562(2) (white light); 2V meas = 22(1)°; orientation Z = b ; pleochroism: X = colourless, Y = pale blue, Z = pale blue; X < Y ≈ Z . Electron microprobe analysis gave the empirical formula [K 2.21 (NH 4 ) 1.79 ] Σ4.00 Mg 0.96 (V 4+ 0.95 O) 2 (C 2 O 4 )[P 1.03 O 3.03 (OH) 0.97 ] 4 (H 2 O) 10 , with the C, N and H contents constrained by the crystal structure. Raman spectroscopy confirmed the presence of NH 4 and C 2 O 4 . Relianceite-(K) is monoclinic, Pc , with a = 12.404 (7) Å, b = 9.014 (6), c = 13.260 (8) Å, β = 100.803(10)°, V = 1456 (2) Å 3 and Z = 2. The structural unit in the crystal structure of relianceite-(K) ( R 1 = 0.0540 for 3751 I o > 2σ I reflections) is a (V 4+ O) 2 (C 2 O 4 )(PO 3 OH) 4 chain in which VO 6 octahedra are bridged by an oxalate group to form [V 2 C 2 O 12 ] dimers, PO 3 OH tetrahedra form a double bridge between the VO 6 octahedra of the dimers, and additional PO 3 OH tetrahedra decorate the chain. Topologically, this is the same chain found in the structure of davidbrownite-(NH 4 ). The MgO(H 2 O) 5 octahedron can be considered a distant decoration on the chain. The chains are linked to each other through an extensive system of K/NH 4 –O bonds and hydrogen bonds.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 0.003 |
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