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Record W2114288502 · doi:10.2113/gscanmin.41.2.479

SYNTHESIS AND PROPERTIES OF V3+ ANALOGUES OF JAROSITE-GROUP MINERALS

2003· article· en· W2114288502 on OpenAlexaffvenue
J. E. Dutrizac, T. T. Chen

Bibliographic record

VenueThe Canadian Mineralogist · 2003
Typearticle
Languageen
FieldEngineering
TopicMetal Extraction and Bioleaching
Canadian institutionsNatural Resources Canada
Fundersnot available
KeywordsJarositeGroup (periodic table)MineralChemistryGeochemistryMineralogyGeologyOrganic chemistry

Abstract

fetched live from OpenAlex

Nous avons synthetise les composes analogues de la natrojarosite, jarosite, jarosite substituee par le rubidium, dorallcharite, hydronium jarosite, ammoniojarosite et plumbojarosite contenant du V 3 + en utilisantune demarche conventionnelle d'hydrolyse, Quoiqu'une temperature de 100°C est acceptable pour la plupart des syntheses, nous avons eu besoin de chauffer a 140°C pour obtenir une quantite suffisante de l'analogue a V 3 + de la hydronium jarosite. De plus, l'analogue a V 3 + de la plumbojarosite a ete synthetise par reaction d'un excedent de PbSO 4 a 150°C, avec dissolution par la suite du PbSO 4 non reagi a temperature ambiante avec une solution d'acetate d'ammonium. Nos efforts pour synthetiser l'analogue a V 3 + de l'argentojarosite n'ont pas reussi, parce que le vanadium trivalent a reduit l'ion Ag + a l'argent metallique. Les analogues vanadiferes (V 3 + ) des mineraux du groupe de la jarosite se presentent en general en aggregats spheroides faits de cristaux individuels atteignant 3 μm de diametre. Selon les donnees de diffraction X, methode des poudres, tous les precipites adoptent la structure R3m des mineraux de ce groupe; toutefois, aucun signe d'une reflexion a ∼11 A n'a ete decele dans l'analogue vanadifere de la plumbojarosite, ce qui temoigne d'un manque d'ordre impliquant les ions Pb 2 + et les lacunes associees. Nous avons aussi mesure la densite de ces analogues a V 3 + ; les valeurs sont relativement faibles a cause des lacunes dans le site V des structures.

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.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation 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 score0.001
Threshold uncertainty score0.003

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

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 head0.028
GPT teacher head0.199
Teacher spread0.171 · 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

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

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".

Quick stats

Citations26
Published2003
Admission routes2
Has abstractyes

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