Analysis of Fe segregation in the octahedral sheet of bentonitic illite-smectite by means of FTIR, 27 Al MAS NMR and reverse Monte Carlo simulations

Clicks: 3
ID: 297608
1999
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Steady

Ranked #724 of 8,486 articles by views in american journal of science

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 8,486 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
A series of bentonite illite/smectite with a range of Fe content (0.08-0.95 atoms per half formula unit) and illite composition (3-97 percent illite) has been analyzed by means of FTIR, ^27^ Al MAS NMR, and theoretical calculations by reverse Monte Carlo simulations to study cation distribution in the octahedral sheet. FTIR was used to determine the proportion of different cation pairs bound to OH groups utilizing the OH bending bands. The proportions of cation pairs were used to generate Monte Carlo distributions of the octahedral cations in the layers. The calculated distributions were then analyzed in comparison with the experimental ^27^ Al NMR results. All samples have shown a high dispersion of the Mg cations and a tendency for Fe segregation which increased with progressing illitization. The illite-rich samples showed medium- or long-range ordering of the octahedral cations. The minimum radius for the wipeout sphere of the ^27^ Al NMR signal around Fe atoms is 7.5 Aa, for our working conditions of 11.7 T.
Reference Key
openalex_W2095877474 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Javier Cuadros
Journal american journal of science
Year 1999
DOI
10.2475/ajs.299.4.289
URL
https://ajs.scholasticahq.com/article/60806.pdf
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.