Hostname: page-component-84b7d79bbc-g7rbq Total loading time: 0 Render date: 2024-07-28T00:14:49.917Z Has data issue: false hasContentIssue false
  • English
  • Français

Dissolution of Smectites in Hydrochloric Acid: II. Dissolution Rate as a Function of Crystallochemical Composition

Published online by Cambridge University Press:  01 July 2024

I. Novák  and
B. Číčel
I. Novák
Affiliation:
Institute of Inorganic Chemistry, Slovak Acad. Sci., 809 34 Bratislava, Czechoslovakia
B. Číčel
Affiliation:
Institute of Inorganic Chemistry, Slovak Acad. Sci., 809 34 Bratislava, Czechoslovakia
Get access Rights & Permissions [Opens in a new window]

Abstract

A correlation was made of crystallochemical data from 15 smectites with the half time of dissolution (t05) in 6 N hydrochloric acid at 96°C. From this the relation

ln t05 = 3.95 - 1.96 FeVI - 2.30 MgVI

was developed. It shows a remarkable dependence of the apparent dissolution rate of the octahedral layer of the smectites on the substitution of Fe3+ and Mg2+ for Al+3 in the octahedral position.

Резюме

Резюме

Было проведено изучение корреляционной зависимости между кристалло-химическими данными 15 образцов смектита и половиной времени их растворения (t05) в 6N соляной кислоте при 9б°С. Отсюда было получено следующее соотношение: ln t05=3.95-1.96FeVI-2.30 MgVI. Оно показывает примечательную зависимость удельной скорости растворения октаэдрического слоя смектитов от замещения Al+3 катионами Fe3+ и Mg2+ в октаэдрической позиции.

Kurzreferat

Kurzreferat

Eine Korrelation kristallchemischer Daten von 15 Smektiten mit den Halbwertszeiten der Auflösung (t05) in 6N HCl bei 96°C wurde aufge-stellt. Daraus wurde die Gleichung: ln t05=3,95-1,96 FeVI-2,30 MgVI abgeleitet. Es zeigte sich eine bemerkenswerte Abhängigkeit der scheinbaren Auflösungsrate der oktahedrischen Schicht der Smektiten von der Substitution von Fe(III) und Mg(II) für Al(III) in der oktahedrischen Position.

Résumé

Résumé

Une corrélation a été établie entre les données cristallochimiques de quinze smectites ayant un demi-temps de dissolution(t05) dans l'acide hydrochlorique 6N à 96°C.La relation suivante a été développée: ln t05=3.95-1.96 FeVI-2.30 MgVI

Elle montre une dépendance remarquable de la vitesse apparente de dissolution du feuillet octaèdral des smectites de la substitution de Fe3+ et Mg2+ à Al+3 dans la position octaèdrale.

Keywords

CrystallochemicalDissolutionHydrochloricNontroniteSmectite
Type
Research Article
Information
Clays and Clay Minerals , Volume 26 , Issue 5 , October 1978 , pp. 341 - 344
Copyright
Copyright © 1978, The Clay Minerals Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Brindley, G. W. and Youell, F. (1951) A chemical determination of the tetrahedral and octahedral aluminium ions in a silicate: Acta Crystallogr. 4, 495–497.CrossRefGoogle Scholar
Číčel, B. and Novák, I. (1976) Dissolution of smectites in HCl: I. Halftime of dissolution as a measure of reaction rate: Proc. 7th Conf. Clay Mineral. Petrol. (in print), Charles Univ., Prague.Google Scholar
Číčel, B., Novák, I. and Pivovarníček, F. (1965) Dissolution of montmorillonite in HCl and its possible application in the study of their activation: Silikáty 9, 130–140 (Slovak).Google Scholar
Donnay, G., Donnay, J. D. H. and Takeda, H. (1964) Trioctahedral one–layer micas. II. Prediction of the structure from composition and cell dimensions: Acta Crystallogr. 17, 1374–81.CrossRefGoogle Scholar
Ezekiel, M. and Fox, K. A. (1959) Methods of Correlation and Regression Analysis. Wiley Inc., New York.Google Scholar
Fahn, R. (1963) Innerkristalline Quellung und Farbstoffadsorption säurebehandelter Montmorillonite: Kolloid Z. 187, 120–127.CrossRefGoogle Scholar
Granquist, W. T. and Gardner-Sumner, G. (1959) Acid dissolution of the Texas bentonite: Clays & Clay Minerals 6, 292–308.Google Scholar
Gregor, M., Číčel, B. and Krempaský, V. (1966) Kinetische Studie des Zerfalles von Montmorillonit in Salzsäure: Zb. Pr. Chemickotechnol. Fak. SVŠT 91–96.Google Scholar
Karšulin, M. and Stubičan, V. (1954) Über die Struktur und die Eigenschaften synthetischer Montmorillonite: Monatsh. Chem. 85, 343–358.CrossRefGoogle Scholar
Osthaus, B. B. (1954) Chemical determination of terahedral ions in nontronite and montmorillonite: Clay & Clay Minerals 2, 404–417.Google Scholar
Osthaus, B. B. (1956) Kinetic studies on montmorillonites and nontronite by acid dissolution technique: Clays & Clay Minerals 4, 301–321.Google Scholar
Packter, A. (1955) Catalysis by complexing anions. The kinetics of the activation of montmorillonite clays: Chem. Ind. 1384.Google Scholar
Turner, R. (1964) Kinetic studies of acid dissolution of montmorillonite and kaolinite: Ph.D. Thesis Univ. Calif.Google Scholar