The crystal-chemistry of Vietnamese talcs from the Thanh Son district (Phu Tho province, Vietnam)
2015; Cambridge University Press; Volume: 50; Issue: 5 Linguagem: Inglês
10.1180/claymin.2015.050.5.05
ISSN1471-8030
AutoresAngela Dumas, F. Martin, The Ngo Ke, Hanh Nguyen Van, Việt Dũng Nguyễn, Vinh Nguyen Tat, Nam Kieu Quy, Pierre Micoud, Philippe de Parseval,
Tópico(s)Geological and Geochemical Analysis
ResumoAbstract 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 ( 29 Si and 1 H) 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.
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