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Imogolite and proto-imogolite in an Italian soil developed on volcanic ash

Published online by Cambridge University Press:  09 July 2018

V. C. Farmer ,
A. R. Fraser ,
J. M. Tait ,
F. Palmieri ,
P. Violante ,
M. Nakai  and
N. Yoshinaga
V. C. Farmer
Affiliation:
Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen, Scotland
A. R. Fraser
Affiliation:
Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen, Scotland
J. M. Tait
Affiliation:
Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen, Scotland
F. Palmieri
Affiliation:
Instituto di Chimica Agraria, Università di Napoli, Portici, Italy
P. Violante
Affiliation:
Instituto di Chimica Agraria, Università di Napoli, Portici, Italy
M. Nakai
Affiliation:
Department of Agricultural Chemistry, Ehime University, Matsuyama, Japan
N. Yoshinaga
Affiliation:
Department of Agricultural Chemistry, Ehime University, Matsuyama, Japan
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Abstract

Imogolite has been identified in small amounts in clays from a soil profile developed on pyroclastics of tephrite-bassanite composition. The major part of the fine clay was an allophanic material termed proto-imogolite, characterized by an infrared spectrum with some of the features given by imogolite, including a well-developed band at 346 cm−1. Similar products have been obtained in the laboratory.

Résumé

Résumé

Dans une coupe de sol, de l'imogolite a été identifiée en petites quantités dans des argiles formées sur des roches pyroclastiques de composition téphrite-bassanite. La plus grande partie de l'argile fine était un matériau allophanique dénommé proto-imogolite, déterminé par un spectre infrarouge avec quelques-unes des caractéristiques données par l'imogolite, notamment une bande bien développée à 346 cm−1. Des produits similaires ont été obtenus en laboratoire.

Kurzreferat

Kurzreferat

Imogolit wurde in kleinen Mengen in Tonen eines Bodenprofils identifiziert, das sich aus Pyroklastika von tephritisch-bassanitischer Zusammensetzung gebildet hatte. Der Hauptanteil des feinen Tons war ein allophanitisches Material, genannt Proto-Imogolit, das durch ein IR-Spektrum mit einigen Merkmalen von Imogolit charakterisiert ist einschliesslich einer gut ausgebildeten Bande bei 346 cm−1. Ähnliche Produkte wurden im Laboratorium erhalten.

Resumen

Resumen

Se ha identificado imogolita en pequeñas cantidades en arcillas procedentes de un perfil de suelo desarrollado en rocas pirocláticas de composición tefrina-basanita. La mayor parte de la arcilla fina era un material alofánico designado protoimogolita, caracterizado por un espectro infrarrojo con algunos de los rasgos de la imogolita, incluso una banda bien desarrollada a 346 cm−1. Se han obtenido productos similares en el laboratorio.

Type
Research Article
Information
Clay Minerals , Volume 13 , Issue 3 , September 1978 , pp. 271 - 274
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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References

Cradwick, P.D.G., Farmer, V.C., Russell, J.D., Masson, C.R., Wada, K. & Yoshinaga, N. (1972) Nature: Phys. Sci., 240, 187.Google Scholar
Farmer, V.C., Fraser, A.R., Russell, J.D. & Yoshinaga, N. (1977) Clay Miner. 12, 55.CrossRefGoogle Scholar
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Hashimoto, I. & Jackson, M.L. (1960) Clays Clay Miner. 7, 102.Google Scholar
Mchardy, W.J. (1971) The Electron-Optical Investigation of Clays (Gard, J. A., editor), p. 365. Mineralogical Society, London.Google Scholar
Violante, P. & Violante, A. (1973) Annali Far. Sci. Agr. Univ. Napoli Ser. 4, 7.Google Scholar