| This sample of francevillite is displayed in the Smithsonian Museum of Natural History. Francevillite is a oxide mineral of uranium with vanadium, lead and barium. It has the composition (Ba,Pb)(UO2)2(VO4)2.5H2O. The sample at left is about 12 cm across and is from Mounana, Gabon.
这件法国维利特矿石陈列在史密森尼自然历史博物馆中。法国维利特是一种含铀、钒、铅和钡的氧化物矿物。其化学式为(Ba,Pb)(UO₂)₂(VO₄)₂·5H₂O。左侧的样品宽约12厘米,来自刚果的蒙纳纳。
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