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Record W2110366881 · doi:10.2113/gscanmin.41.3.707

CRYSTAL CHEMISTRY OF URANYL MOLYBDATES. VIII. CRYSTAL STRUCTURES OF Na3Tl3[(UO2)(MoO4)4], Na13-xTl3+x[(UO2)(MoO4)3]4(H2O)6+x (x = 0.1), Na3Tl5[(UO2)(MoO4)3]2(H2O)3 AND Na2[(UO2)(MoO4)2](H2O)4

2003· article· en· W2110366881 on OpenAlexvenueno aff
Sergey V. Krivovichev, Peter C. Burns

Bibliographic record

VenueThe Canadian Mineralogist · 2003
Typearticle
Languageen
FieldChemistry
TopicRadioactive element chemistry and processing
Canadian institutionsnot available
Fundersnot available
KeywordsUranylCrystallographyCrystal chemistryCrystal (programming language)Crystal structureChemistryMolybdateMaterials scienceInorganic chemistryUraniumMetallurgy

Abstract

fetched live from OpenAlex

Nous avons synthetise par voie hydrothermale des cristaux de quatre molybdates uranyles de sodium, Na 3 Tl 3 [(UO 2 )(MoO 4 ) 4 ] (1), Na 1 3 - x Tl 3 + x [(UO 2 )(MoO 4 ) 3 ] 4 (H 2 )O 6 + x (x=0.1) (2), Na 3 Tl 5 [(UO 2 )(MoO 4 ) 3 ] 2 (H 2 O) 3 (3) et Na 2 [(UO 2 )(MoO 4 ) 2 ](H 2 O) 4 (4). La structure de chaque compose a ete resolue et affinee en utilisant les facteurs F 2 de toutes les donnees uniques, prelevees avec rayonnement MoKα et un detecteur de type CCD. La structure de 1 [orthorhombique, Pbcn, a 20.5823(14), b 7.4391(5), c 26.2514(17) A, V 4019.5(5) A 3 , Z = 8] a ete affinee jusqu'a un residu RI de 0.060. Elle repose sur la presence d'un groupement fini ayant une composition [(UO 2 ) 2 (MoO 4 ) 8 ] 1 2 , qui contient deux bipyramides pentagonales UrO 5 et huit tetraedres MoO 4 . Les groupements sont lies dans une trame grâce a des octaedres difformes Na(1)O 6 et Na(2)O 6 . Le site des atomes Tl et Na, ces derniers dans des sites partiellement occupes [Na(3) et Na(4)], sont situes dans des cavites dans la trame. La structure de 2 [monoclinique, P2/c, a 19.7942(11), b 7.1913(4), c 22.8835(13) A, β 97.828(1) c , V 3227.0(3) A 3 , Z = 2] a ete affinee jusqu'a un facteur R1 de 0.050. Elle contient des chaines; de composition [(UO 2 )(MoO 4 ) 3 ] 4 - paralleles a l'axe a. Les chaines sont interliees dans une trame tri-dimensionnelle par des polyedres NaΦ 5 et NaΦ 6 (Φ: O 2 - , H 2 O) partageant des aretes. Les atomes Tl sont situes dans des cavites de cette trame. La structure de 3 [orthorhombique, P2 1 2 1 2 1 , a 10.7662(6), b 11.9621(6), c 12.8995(7) A, V 1661.3(2) A 3 , Z = 2] a ete affinee jusqu'a un facteur R1 de 0.063. Elle est faite de chaines de composition [(UO 2 )(MoO 4 ) 3 ] 4 - paralleles a l'axe c, et liees dans une trame par des octaedres Na(1)Φ 6 . Les atomes Tl et les sites Na(2) partiellement occupes sont situes dans des cavites dans cette trame. La structure de 4 [monoclinique, P2 1 /n, a 8.9023(5), b 11.5149(6), c 13.8151(7) A, β 107.743(1)°, V 1348.8(1) A 3 , Z = 4] a ete affinee jusqu'a un residu R1 de 0.035. Elle contient des feuillets de composition [(UO 2 )(MoO 4 ) 2 ] 2 - paralleles au plan (101). Les octaedres NaΦ 6 , partagent des aretes entre eux. pour donner des chaines paralleles a l'axe b qui lient les feuillets [(UO 2 )(MoO 4 ) 2 ] 2 - adjacents en une trame. Les quatre structures sont comparees a celles de molybdates uranyles apparentes.

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 score0.003
Threshold uncertainty score0.006

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 science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0020.000

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 head0.012
GPT teacher head0.222
Teacher spread0.210 · 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

Citations63
Published2003
Admission routes1
Has abstractyes

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