Thermal properties of Australian sedimentary opals and Czech moldavites

0438352 - FZÚ 2015 RIV HU eng J - Článek v odborném periodiku
Thomas, P.S. - Šesták, Jaroslav - Heide, K. - Fueglein, E. - Šimon, P.
Thermal properties of Australian sedimentary opals and Czech moldavites.
Journal of Thermal Analysis and Calorimetry. Roč. 99, č. 3 (2010), s. 861-867. ISSN 1388-6150. E-ISSN 1588-2926.
[Mediterranean Conference on Calorimetry and Thermal Analysis /9./. Marseille, 15.06.2009-18.06.2009]
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: amorphous silica * DEGAS * moldavite * opal * TG-DSC * TMA
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.752, rok: 2010

The thermal properties are presented for a precious opal sourced from Coober Pedy, South Australia and a moldavite from Bohemia, Czech Republic whose origins differ significantly as opal is derived from the slow isothermal diagenesis of silica, while the tektites are specimens of vitreous silica formed from the terrestrial impact of asteroids. The differences between the two glassy silicates are presented through measurement of the TG-DSC, TMA and high-vacuum-hot-extraction DEGAS analysis.
Trvalý link: http://hdl.handle.net/11104/0241769