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Gradual H/D substitution in synthetic germanium bearing talcs: a method for infrared band assignment

Published online by Cambridge University Press:  09 July 2018

F. Martin ,
S. Petit ,
O. Grauby  and
M. P. Lavie
F. Martin
Affiliation:
Université Paul Sabatier , Laboratoire de Minéralogie-Cristallographie, UMR 5563 CNRS, 39 Allées Jules Guesde, F-31000 Toulouse
S. Petit
Affiliation:
Université de Poitiers, Laboratoire ‘Hydr. A.S.A.’, UMR 6532 du CNRS, 40 Avenue du Recteur Pineau, F-86022 Poitiers Cedex
O. Grauby
Affiliation:
CRMC2-CNRS, Campus Luminy, Case 913, F-13288 Marseille Cedex 9, France
M. P. Lavie
Affiliation:
Université Paul Sabatier , Laboratoire de Minéralogie-Cristallographie, UMR 5563 CNRS, 39 Allées Jules Guesde, F-31000 Toulouse
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Abstract

The deuteration technique was used to assign unknown infrared (IR) bands of Ge-bearing talcs. Procedures to achieve partial or complete H/D replacement in synthetic Ge-bearing (Mg, Ni and Co)-talcs have been investigated. From the spectral shift of IR absorption bands in the 4000–300 cm-1 region resulting from the H-D substitution, the IR bands of vibrations of Ge-bearing talcs could be identified and synthetic Ge-bearing talcs showed significantly different IR spectra from those for Si-talcs. After deuteration of synthetic Ge-bearing talcs, the unknown bands were attributed either to hydroxyl groups or to Ge–O vibrations of the clay skeleton, and the spectra were interpreted fully.

Type
Research Article
Information
Clay Minerals , Volume 34 , Issue 2 , June 1999 , pp. 365 - 374
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

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