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Record W1974833691 · doi:10.2113/gscanmin.42.3.781

MANGANOKUKISVUMITE, A NEW MINERAL SPECIES FROM MONT SAINT-HILAIRE, QUEBEC

2004· article· en· W1974833691 on OpenAlexaffvenueabout
R. A. Gault, T. S. Ercit, Joel D. Grice, Jerry Van Velthuizen

Bibliographic record

VenueThe Canadian Mineralogist · 2004
Typearticle
Languageen
FieldMaterials Science
TopicCrystal Structures and Properties
Canadian institutionsCanadian Museum of Nature
Fundersnot available
KeywordsSAINTMineralGeologyGeochemistryMaterials scienceArtMetallurgyArt history

Abstract

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La manganokukisvumite, de formule ideale Na 6 MnTi 4 Si 8 O 2 8 .4H 2 O, est une nouvelle espece minerale decouverte a la carriere Poudrette, au mont Saint-Hilaire, comte de Rouville, Quebec (IMA 2002-029). On la trouve dans de petites vacuoles d'une breche syenitique riche en albite; lui sont associes aegyrine, microcline, albite, annite, chalcopyrite, pyrite, pyrrhotite, natrolite, labuntsovite-Mn, titanite, calcite, un membre du groupe de la chlorite, magnetite, fluorapatite, elpidite et sodalite. Les cristaux de manganokukisvumite sont incolores a transparents avec un eclat vitreux et une rayure blanche. Elle est non-fluorescente en lumiere ultra-violette (ondes courtes ou longues). Les cristaux sont extremement minces, aplatis et en forme d'epee, jusqu'a 0.5 mm en longueur, et generalement en regroupes en rosette. Les formes observees sont les pinacoides {100} et {010} et un prisme que nous etions incapables de mesurer. Il ne semble pas y avoir de macle. La durete est entre 5½ et 6. Le mineral est sectile, legerement flexible, sans clivage apparent, mais avec une fracture en echapes. La manganokukisvumite est biaxe negative, avec α(calc.) 1.657, β 1.744 ′ 0.003 et γ 1.792 ′ 0.003 (pour λ = 589 nm); 2V m e s 70° (methode de Kamb). Il n'y a aucune dispersion et aucun pleochroisme: l'orientation optique estX = a, Y = b et Z = c. Il s'agit d'un mineral orthorhombique, groupe spatial Pccn, ayant les parametres reticulaires suivants, affines a partir des donnees sur poudre: a 29.05(2), b 8.612(6), c 5.220(4) A, V 1305.9(3) A 3 et Z = 2. Les raies les plus intenses du spectre de diffraction, methode des poudres [d en A(D(hkl)] sont: 14.47(100)(200), 6.43(20)(310), 4.83(10)(600), 3.743(10)(710), 3.025(40)(910), 2.881 (20)(521 ), 2.591(10)(721), 2.458(10(402) et 2.146(10)(930). Une analyse obtenue avec une microsonde electronique, complementee avec un spectre d'absorption infra-rouge, a donne Na 2 O 15.61, K 2 O 0.21, MgO 0.26, CaO 0.08, MnO 5.48, FeO 0.57, Al 2 O 3 0.16, Ce 2 O 3 0.18, SiO 2 41.74. TiO 2 26.90, Nb 2 O 5 0.68, H 2 O 6.25 (quantite calculee par stoechiometrie), pour un total de 98.12% (poids). La formule empirique, calculee sur une base de 32 atomes d'oxygene, est: (Na 5 . 8 1 K 0 . 0 5 Ca 0 . 0 2 Ce 0 . 0 1 ) Σ 5 . 8 9 (Mn 0 . 8 9 Fe 0 . 0 9 Mg 0 . 0 7 Al 0 . 0 4 ) Σ 1 . 0 9 (Ti 3 . 8 8 Nb 0 . 0 6 ) Σ 3 . 9 4 Si 8 . 0 1 O 2 8 .4H 2 O ou, en termes plus simples, Na 6 MnTi 4 Si 8 O 2 8 .4H 2 O. La densite calculee (a partir de la formule empirique) est 2.88 g/cm 3 , et la densite mesuree est 2.86(1) g/cm 3 . L'indice de compatibilite selon la loi de Gladstone et Dale est 0.038 (excellent). La manganokukisvumite est l'analogue a dominance de manganese de la kukisvumite; elle montre un lien etroit avec la lintisite.

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 score0.120
Threshold uncertainty score0.242

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0020.001
Science and technology studies0.0030.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0030.000

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 head0.019
GPT teacher head0.200
Teacher spread0.181 · 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

Citations10
Published2004
Admission routes3
Has abstractyes

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