REFINEMENT OF THE CRYSTAL STRUCTURE OF ARSENIOPLEITE: CONFIRMATION OF ITS STATUS AS A VALID SPECIES
Bibliographic record
Abstract
L'arseniopleite, dont la formule ideale est (Ca,Na) (Na,Pb 2 + ) Mn 2 + (Mn 2 + ,Mg,Fe 2 + ) 2 As 3 O 1 2 est monoclinique, a 6.8113(6), b13.0358(11). c 11.3245(10) A, β 100.25(3)°, V989.5(1) A 3 , 12/aZ = 2; nous l'avons affine jusqu'a un residu R de 2.3% pour 1280 reflexions observees (‖F o ‖≥4σF) mesurees avec un diffractometre Bruker P4 muni d'un detecteur de type CCD (rayonnement MoKα). Le cristal utilise pour le prelevement des intensites des rayons X a par la suite ete analyse avec une microsonde electronique. Dans l'arseniopleite, le site M( 1 ) possede une coordinence octaedrique; il est occupe completement par le Mn 2 + , avec une distance de 2.218 A. Le site M (2) possede aussi une coordinence octaedrique et contient Mn 2 + , Mg et Fe 3 + , la distance etant 2,129 A. Le site X(1) est deplace de sa position speciale ideale, ce qui localement diminue la coordinence de [8] a [7]; X (1) contient surtout le Ca et, a un degre moindre, Na, avec une distance de 2.584 A. Le site X(2) possede une coordinence [8], et la distance est 2.732 A. Le site contient surtout Na, avec des quantites mineures de Pb 2 + et Ba. La formule empirique est (Ca 0 . 6 8 Na 0 . 3 2 ) (Na0.93 Pb 2 + 0 . 0 6 Ba 0 . 0 1 ) Mn 2 + (Mn 2 + 2 1 Mg 0 . 5 2 Fe 3 + o . 2 7 ) (As 2 . 9 8 P 0 . 0 2 ) O 1 2 . L'arseniopleite est donc confirmee comme espece minerale valide, distincte de la caryinite. Dans l'arseniopleite, le Mn 2 + predomine au site M(1),tandis que dans la caryinite, c'estle Ca qui est dominant La composition ideale de ces especes est comme suit: arseniopleite: Ca Na Mn 2 + Mn 2 + 2 As 3 On 1 2 ; caryinite: Ca Na Ca Mn 2 + 2 As 3 O 1 2 .
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.006 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".