Presence of negative charge on the basal planes of New York talc

Burdukova, E., Becker, M., Bradshaw, D. J. and Laskowski, J. S. (2007) Presence of negative charge on the basal planes of New York talc. Journal of Colloid and Interface Science, 315 1: 337-342. doi:10.1016/j.jcis.2007.06.067


Author Burdukova, E.
Becker, M.
Bradshaw, D. J.
Laskowski, J. S.
Title Presence of negative charge on the basal planes of New York talc
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
Publication date 2007-11-01
Sub-type Article (original research)
DOI 10.1016/j.jcis.2007.06.067
Volume 315
Issue 1
Start page 337
End page 342
Total pages 6
Place of publication Amsterdam, The Netherlands
Publisher Elsevier B.V
Language eng
Subject 290701 Mining Engineering
Abstract Potentiometric titration measurements as well as rheological measurements of talc aqueous suspensions indicate that the behavior of the New York talc particles is consistent with the presence of a negative charge on their basal planes. The possibility of the presence of a negative electrical charge on the basal planes of talc particles is analyzed in this paper. Samples of New York talc were studied using electron microprobe analysis and dehydration techniques and the exact chemical formula of New York talc was determined. It was found that there exists a deficiency of protons in the tetrahedral layers of talc, resulting from substitution of Si4+ ions with Al3+ and Ti3+ ions. The comparison of the level of substitution of Si4+ ions with ions of a lower valency was found to be of a similar order of magnitude as that found in other talc deposits. This strongly points to the presence of a negative charge on the talc basal planes
Keyword Potentiometric titration measurements
Rheological measurements
Talc aqueous suspensions
New York talc
Electron microprobe
Tetrahedral layers
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Excellence in Research Australia (ERA) - Collection
 
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Created: Wed, 13 Jan 2010, 09:35:10 EST by Rosalind Blair on behalf of Sustainable Minerals Institute