一、引言沥青铀矿也称为非晶质铀矿,含U_3O_8量可达80%以上,因此矿物具有强烈的α及γ辐射。铀经过一系列的衰变最后变成稳定的Pb~(206),所以铀矿物中一般都有铅存在。矿物的化学式可用kUO_2·lUO_3·mPbO表示。当四价铀被其他元素置换时形成变种,例如被钍置换时,形成铀钍矿;被稀土元素置换时,形成钇铀矿。 I. INTRODUCTION Bituminous uranium ore is also called amorphous uranium ore, and contains up to 80% of U_3O_8. Therefore, the minerals have strong α and γ radiation. After a series of decay of uranium eventually become stable Pb ~ (206), so uranium minerals are generally present in the lead. Mineral chemical formula available kUO_2 · lUO_3 · mPbO said. When tetravalent uranium is replaced by other elements to form a variety, for example, by thorium replacement, the formation of uranium thorium ore; by the replacement of rare earth elements, the formation of uranium yttrium.