Meta-autunite in pegmatites from Baixo dos Quintos, Brazil (CROSBI ID 487239)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Bermanec, Vladimir ; Wegner, Reinhard ; Kniewald, Goran ; Palinkaš, Ladislav ; Rajić, Maša ; Sultan Syed Abbas
engleski
Meta-autunite in pegmatites from Baixo dos Quintos, Brazil
Meta-autunite in pegmatites from Baixo dos Quintos, Brazil was investigated. The total uranium content, the 238U/235U isotopic ratio and major and trace element constituent analysis were done by ICP-OES and ICP-MS. Unit cell dimensions (a=6.990(1)A, c=8.454(1)A and V=413.l (l)A3 ) were calculated from X-ray diftraction data. Thermal analysis showed a weight . loss of 16.03 wt.% in four distinct processes up to 1500°C. The meta-autunite has the following formula: (Ca0.808Ba0.032Sr0.030Mg0.011Na0.011Al0.032) Σ 1.015(UO2)2(P1.988As0.008Bi0.004( x 2H2O and has a near to natural isotopic ratio of 238U/235U.
pegmatite; 238U/235U; meta-atunite
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
20-20-x.
2002.
objavljeno
Podaci o matičnoj publikaciji
11th International Association on the Genesis of Ore Deposits (IAGOD) Quadrennial Symposium in Association with GEOCONGRESS 2002 : Earth Systems and Metallogensis : Extenden Abstracts
Windhoek: Geological Survey of Namibia
Podaci o skupu
11th International Association on the Genesis of Ore Deposits (IAGOD) Quadrennial Symposium in Association with GEOCONGRESS 2002 : Earth Systems and Metallogensis
poster
22.07.2002-26.07.2002
Windhoek, Namibija
