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Record W2016128270 · doi:10.2113/gscanmin.41.6.1413

THE STRUCTURE OF DANALITE AT HIGH TEMPERATURE OBTAINED FROM SYNCHROTRON RADIATION AND RIETVELD REFINEMENTS

2003· article· en· W2016128270 on OpenAlex

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.

venuePublished in a venue whose home country is Canada.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueThe Canadian Mineralogist · 2003
Typearticle
Languageen
FieldMaterials Science
TopicCrystal Structures and Properties
Canadian institutionsnot available
FundersBrookhaven National LaboratoryNational Science Foundation
KeywordsPhysicsChemistryHumanitiesArt

Abstract

fetched live from OpenAlex

Nous avons etudie le comportement structural de la danalite, de composition ideale Fe 8 [Be 6 So 6 O 2 4 ]S 2 , a pression atmospherique lors d'un chauffage de 33 a 1035°C, en utilisant des donnees de diffractionX sur poudres generees in situ avec rayonnement synchrotron (λ = 0.92249 A) et traitees par affinement de Rietveld. L'echantillon a ete chauffe a un taux d'environ 9.5°C/min., et les traces des spectres ont ete preleves a des intervalles de 18°C environ. Le parametre reticulaire de la danalite augmente de facon lineaire jusqu'a 1035°C. Le taux de changement de son volume entre 33 et 1035°C est 1.6(1)%. Les autres parametres structuraux font preuve d'un changement abrupt a environ 926°C. Entre 33 et 926°C, les distances Be-O et Si-O demeurent presque constantes. Entre 926 et 1035°C, la longueur de la liaison Be-O diminue, tandis que celle de la liaison Si-O augmente, mais les changements sont faibles. Entre 33 et 926°C, l'angle Be-O-Si augmente de 1.12(3)°, et l'augmentation totale jusqu'a 1035°C est 1.21(3)°. En meme temps, entre 33 et 926°C, les angles de rotation des tetraedres BeO 4 (φ B e ) et SiO 4 (φ S i ) diminuent d'environ 0.71°, respectivement. Entre 926 et 1035°C, φ B e et φ S i augmentent d'environ 0.23°. La liaison Fe-S augmente en longueur de 0.023(1) A entre 33 et 926°C, et de 0.007(1) A entre 926 et 1035°C. La liaison Fe-O augmente en longueur de 0.024(1) A entre 33 et 926°C, et diminue de 0.001(1) A entre 926 et 1035°C. Les coefficients de deplacement des atomes Fe et S sont importants, et la liaison Fe-S s'allonge avec la temperature, les atomes de Fe se rapprochant progressivement du plan des anneaux a six membres dans la trame, ce qui cause une legere rotation des tetraedres, et mene a une expansion de la structure. Le changement abrupt des parametres structuraux a probablement lieu a cause de l'oxydation des cations Fe 2 + (et, en quantite moindre, Mn 2 + ) au dela de 771°C, et la perte de S 2 (g) au dela de 1029°C.

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 imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.423
Threshold uncertainty score0.666

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0010.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.007
GPT teacher head0.195
Teacher spread0.188 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it