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The crystal-chemistry of Vietnamese talcs from the Thanh Son district (Phu Tho province, Vietnam)

Published online by Cambridge University Press:  02 January 2018

Angela Dumas*
Affiliation:
GET UMR 5563 (Géosciences Environnement Toulouse), UPS-CNRS-IRD-CNES, ERT 1074 ‘Géomatériaux’, 14, Avenue Édouard Belin; F-31400 Toulouse, France
François Martin
Affiliation:
GET UMR 5563 (Géosciences Environnement Toulouse), UPS-CNRS-IRD-CNES, ERT 1074 ‘Géomatériaux’, 14, Avenue Édouard Belin; F-31400 Toulouse, France
The Ngo Ke
Affiliation:
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 rue Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
Hanh Nguyen Van
Affiliation:
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 rue Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
Dung Nguyen Viet
Affiliation:
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 rue Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
Vinh Nguyen Tat
Affiliation:
YFA Company Limited, Thanh Thuy District, Phu Tho Province, Vietnam
Nam Kieu Quy
Affiliation:
Institute of Geological Science, Vietnam Academy of Science and Technology, 84 – Chua Lang Str., Dong Da, Hanoi, Vietnam
Pierre Micoud
Affiliation:
GET UMR 5563 (Géosciences Environnement Toulouse), UPS-CNRS-IRD-CNES, ERT 1074 ‘Géomatériaux’, 14, Avenue Édouard Belin; F-31400 Toulouse, France
Philippe De Parseval
Affiliation:
GET UMR 5563 (Géosciences Environnement Toulouse), UPS-CNRS-IRD-CNES, ERT 1074 ‘Géomatériaux’, 14, Avenue Édouard Belin; F-31400 Toulouse, France

Abstract

The mineralogy and crystal chemistry of a new talc ore deposit situated at Thu Ngac commune, Thanh Son district, Phu Tho province, Vietnam, was investigated using X-ray fluorescence, electron microprobe, X-ray diffraction, Fourier transform infrared spectroscopy, solid-state nuclear magnetic resonance (29Si and 1H) and colorimetry.

Both chemical and crystal-chemical analyses showed that the talcs from the Phu Tho province are very pure because they contain few accessory minerals (chlorite, amphibole and goethite) and few substitutions of Si by Fe and Al in their crystal structure. The talc ore may well meet the standards required for a wide range of industrial applications.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2015

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