Unusual illite-dioctahedral vermiculite interstratification with Reichweite 2 in clays from northern Hungary

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Marco E. Ciriotti
Messaggi: 24698
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Unusual illite-dioctahedral vermiculite interstratification with Reichweite 2 in clays from northern Hungary

Messaggio da Marco E. Ciriotti » lun 26 feb, 2018 11:44

Prossima pubblicazione.

Referenza:
▪ Dietel, J., Ufer, K., Kaufhold, S., Dohrmann, R. (2018): Unusual illite-dioctahedral vermiculite interstratification with Reichweite 2 in clays from northern Hungary. European Journal of Mineralogy, 30, (in press).
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 24698
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: Unusual illite-dioctahedral vermiculite interstratification with Reichweite 2 in clays from northern Hungary

Messaggio da Marco E. Ciriotti » sab 09 giu, 2018 15:37

Referenza:
▪ Dietel, J., Ufer, K., Kaufhold, S., Dohrmann, R. (2018): Unusual illite-dioctahedral vermiculite interstratification with Reichweite 2 in clays from northern Hungary. European Journal of Mineralogy, 30, (in press).

Abstract:
The process of smectite to illite transformation (smectite illitization) in low-temperature environments is known to produce a range of interstratifications with varying extent of ordering (Reichweite). Reichweite values of R = 2 are rarely described in contrast to R values of 0, 1, or 3. In the present study a clay dominated by an R2 interstratification composed of illitic and expandable layers from the Tokaj Mountain hydrothermal area (Hungary) is presented. The interstratification was highly enriched in the <0.1 μm fraction with minor impurities of illite and kaolinite. The sample was characterized by a multimethod approach using X-ray diffraction (XRD) and Rietveld refinement, X-ray fluorescence, Fe2+/3+ determination, simultaneous thermal analyses, cation exchange capacity determination of both untreated and Li-saturated specimens, and transmission electron microscopy. The parameters refined by the Rietveld method were comparable to measured or calculated data. The expandable layers were characterized as dioctahedral with an average layer charge per formula unit of 0.63 mol(+)/mol exceeding slightly the range defined for smectite. Hence, this interstratification should be denoted as R2 illite–dioctahedral vermiculite. However, an R2 illite–smectite Rietveld structural model fitted the measured XRD pattern of the R2 illite–dioctahedral vermiculite in different states very well and can be used for quantification purposes in natural or artificial mixtures.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

Avatar utente
Marco E. Ciriotti
Messaggi: 24698
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: Unusual illite-dioctahedral vermiculite interstratification with Reichweite 2 in clays from northern Hungary

Messaggio da Marco E. Ciriotti » mer 17 ott, 2018 18:45

Articolo pubblicato.

Referenza:
▪ Dietel, J., Ufer, K., Kaufhold, S., Dohrmann, R. (2018): Unusual illite-dioctahedral vermiculite interstratification with Reichweite 2 in clays from northern Hungary. European Journal of Mineralogy, 30, 747-757.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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