导言以前,作者曾经举出一系列的事实和论据,说明沥青铀矿最初不呈晶质铀矿——天然二氧化铀的形式,而呈其他亚稳定的,随后又转化为晶质铀矿的氧化物形式结晶的。所举的在天然氧化物中结晶化学转变的部分例子由于专门研究的结果得到了另外的解释,因为某些沥青铀矿表现为 INTRODUCTION Previously, the authors cite a series of facts and arguments that illustrate that asphaltic uranium was not originally in the form of a crystalline uranium ore, natural uranium dioxide, but was otherwise metastable and subsequently converted to crystalline uranium Oxide form of crystalline. Some examples of crystallized chemical transformations in natural oxides are given as additional explanations for the results of the specialized studies as some of the bitumen uranium behave as