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Record W2492538725

중성자분말회절법을 이용한 금운모 결정에 대한 리트벨트 구조분석

2003· article· ko· W2492538725 on OpenAlexaboutno aff
이철규, 송윤구, 전철민, 김신애, 성기훈

Bibliographic record

VenueJournal of the Mineralogical Society of Korea · 2003
Typearticle
Languageko
FieldMaterials Science
TopicGlass properties and applications
Canadian institutionsnot available
Fundersnot available
KeywordsPhlogopiteCrystallographyChemistryStructural formulaAnalytical Chemistry (journal)Physics
DOInot available

Abstract

fetched live from OpenAlex

캐나다 퀘벡주 파커광산(Parker mine)에서 산출된 삼팔면체 운모인 금운모-1M 시료에 대하여 중성자분말회절 분석을 실시하고 리트벨트법을 통해 그 결정구조를 해석하였으며, 특히 X선 분말회절법으로는 해석이 어려운 금운모 구조 내의 OH기의 크기 및 길이, 그리고 방향성을 결정하였다. 연구에 이용된 금운모의 화학조성은 EPMA 분석결과 $K_2$ (M $g_{4.46}$ F $e_{0.83}$ A $l_{0.34}$ $Ti_{0.22}$ )(S $i_{5.51}$ A $l_{2.49}$ ) $O_{20}$ (O $H_{3.59}$ $F_{0.41}$ )로 나타났다. 중성자 분말회절실험은 상온과 극저온(-263 $^{\circ}C$ )에서 실시하였으며, 회절값으로부터 구한 금운모의 단위포 상수는 a=5.30∼5.31 $\AA$ , b=9.18∼9.20 $\AA$ , c=10.18∼10.21 $\AA$ , $\beta$ =100.06 100.06∼100.08 $^{\circ}$ 로 결정되었다. R지수의 경우 극저온(-263 $^{\circ}C$ )에서의 값이 $R_{p}$ =2.35%, 2.35%, $R_{wp}$ =3.01%� 3.01%로, 상온에서의 값( $R_{p}$ =2.51%, 2.51%, $R_{wp}$ =3.18%)� 3.18%)보다 다소 적게 나타났는데, 이는 낮은 온도에서 온도인자 (B_iso)에 대한 영향이 적어짐에 따라 나타나는 결과로 생각된다. OH기의 결합거리는 상온에서 0.93 $\AA$ , 저온에서 1.03 $\AA$ , 방향성은 93.4 $^{\circ}$ ∼93.6 $^{\circ}$ 로 측정되었다 극저온에서 상온으로 온도가 상승하면서 OH기의 크기가 감소하는 것은 온도 상승에 따른 진동효과보다는 결정구조내의 수소결합과 관련있는 것으로 해석된다.석된다.석된다.으로 해석된다.석된다.석된다. 【The Rietveld structure refinement for the natural trioctahedral mica, phlogopite-1M (Parker Mine, Quebec, Canada) has been done by high resolution neutron powder diffraction at $25^{\circ}C$ and -263 $^{\circ}C$ . The structural formula of phlogopite determined by electron probe microanalysis is $K_2$ (M $g_{4.46}$ F $e_{0.83}$ A $l_{0.34}$ $Ti_{0.22}$ )(S $i_{5.51}$ A $l_{2.49}$ ) $O_{20}$ (O $H_{3.59}$ $F_{0.41}$ ). Cell parameters are a=5.30∼5.31 $\AA$ , b=9.18∼9.20 $\AA$ , c=10.18∼10.21 $\AA$ , $\beta$ =100.06 100.06∼100.08 $^{\circ}$ . Refinements converged to R values in the range of $R_{p}$ =2.35%, 2.35%, $R_{wp}$ =3.01%, 3.01%, respectively. In this study, the OH bond length is calculated to 0.93 $\AA$ at room temperature and 1.03 $\AA$ at -263 $^{\circ}C$ , and the angles between OH vector and (001) plane are obtained 93.4 $^{\circ}$ ∼93.6 $^{\circ}$ . The decrease in the length of OH with the increase in temperature should be due to the hydrogen bonding in the structure of phogopite.e.e.f phogopite.e.e.】

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 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)0.002
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesInsufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.535
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0020.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0000.000
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.001
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 head0.029
GPT teacher head0.245
Teacher spread0.217 · 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 teacher head, not a consensus.

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".

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Citations0
Published2003
Admission routes1
Has abstractyes

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