Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-26T08:57:44.042Z Has data issue: false hasContentIssue false
  • English
  • Français

The use of RbCl disks for the infrared spectroscopy detection of hydrated and dehydrated halloysite in mixtures with kaolinite

Published online by Cambridge University Press:  09 July 2018

E. Mendelovici  and
A. Sagarzazu
E. Mendelovici
Affiliation:
Laboratorio Físicoquimica de Materiales, IVIC, Apartado 1827, Caracas 1010-A, Venezuela
A. Sagarzazu
Affiliation:
Laboratorio Físicoquimica de Materiales, IVIC, Apartado 1827, Caracas 1010-A, Venezuela
Get access Rights & Permissions [Opens in a new window]

Abstract

A simple IR spectroscopy method for detecting hydrated and dehydrated halloysite in artificial mixtures with kaolinite is described. The method is based on the exclusive ability of RbCl among the alkali halides to form a complex with halloysite but not with kaolinite. This complex absorbs at 3500 cm−1 when hydrated halloysite or admixed halloysite is examined in RbCl disks, the limit of detection being 15% in the kaolin admixture. Heating the clay powders or corresponding RbCl disks at 110°C affects the 3500 cm−1 frequency. The development of this absorption band together with a decrease in the intensity ratio of the 3690/3620 cm−1 frequencies is proportional to increasing amounts of halloysite in the kaolin admixtures. This method has an analytical applicability and is relatively rapid.

Type
Research Article
Information
Clay Minerals , Volume 20 , Issue 4 , December 1985 , pp. 493 - 498
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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

Barrios, J., Plançon, A., Cruz, M.I. & Tchoubar, C. (1977) Qualitative and quantitative study of stacking faults in a hydrazine treated kaolinite—Relationship with the infrared spectra. Clays Clay Miner. 25, 422–492.Google Scholar
Carr, R.M., Chaikum, N. & Patterson, N. (1978) Intercalation of salts in halloysite. Clays Clay Miner. 26, 144–152.Google Scholar
Keller, W.D. & Haenni, R.P. (1978) Effects of micro-sized mixtures of kaolin minerals on properties of kaolinites. Clays Clay Miner. 26, 384–396.Google Scholar
Mendelovici, E., Yariv, S. & Villalba, R. (1979) Iron-bearing kaolinite in Venezuelan laterites. I. Infrared spectroscopy and chemical dissolution evidence. Clay Miner. 14, 323–331.Google Scholar
Mendelovici, E., Villalba, R. & Yariv, S. (1982) Iron-bearing kaolinite in Venezuelan laterites. II. DTA and thermal weight losses of KCl and CsC1 mixtures of laterites. IsraeI J. Chem. 22, 247–252.CrossRefGoogle Scholar
Mendelovici, E., Villalba, R. & Sagarzazu, A. (1983a) Comparative analysis, mineralogy and characterization of natural diaspore clay. Proc. II Int. Seminar Laterization Processes Sao Paulo, 465-473.Google Scholar
Mendelovici, E., Villalba, R. & Sagarzazu, A. (1983b) Selective destruction and differentiation of clay minerals from natural diaspore admixture by mortar grinding. Int. J. Miner. Processing 11, 131–138.Google Scholar
Yariv, S. & Shoval, S. (1975) The nature of the interaction between water molecules and kaolin-like layers in hydrated halloysite. Clays Clay Miner. 24, 473–479.Google Scholar
Yariv, S. & Shoval, S. (1976) Interaction between alkali-halides and halloysite: IR study of the interaction between alkali-halides and hydrated halloysite. Clays Clay Miner. 24, 253–261.Google Scholar
Yariv, S., Mendelovici, E. & Villalba, R. (1982). The study of the interaction between cesium chloride and kaolinite by thermal methods. Proc. 7th Int. Conf. Thermal Anal. Kingston, Ontario, 535—540.Google Scholar