Caractérisation par résonance paramagnétique électronique (RPE) de quartz naturels issus de différentes sources

DUTTINE, Mathieu; VILLENEUVE, Gérard; BECHTEL, Françoise; DEMAZEAU, Gérard

doi:10.1016/S1631-0713(02)01845-X

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DUTTINE, Mathieu
Institut de Recherches sur les Archéomatériaux [IRAMAT]

VILLENEUVE, Gérard
Institut de Recherches sur les Archéomatériaux [IRAMAT]

BECHTEL, Françoise
Institut de Recherches sur les Archéomatériaux [IRAMAT]

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Comptes Rendus Géoscience. 2002, vol. 334, n° 13, p. 949-955

Elsevier

Resumen en inglés

Natural quartz crystals coming from Madagascar, Angola, Brazil, and Spain were studied by EPR after β irradiation in order to characterise the paramagnetic centres due to impurities, and examine in which way their relative proportion could constitute a useful criterion for origin researches. In all our samples, EPR experiments revealed germanium centres [GeO4/M+]° with M = Li or Na, aluminium ones [AlO4/h]° and two titanium centres ([TiO4/H+]° and [TiO4/M+]°) also appeared, except for samples coming from Spain. The comparison of the relative concentrations of paramagnetic species led us on to draw diagrams that allowed distinguishing the origins of the studied samples using only EPR spectra.< Leer menos

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EPR

Natural quartz

Characterisation

Paramagnetic defects

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