Pitchblende and chalcolite are much more radioactive than uranium itself . 沥清铀矿和铜铀云母比纯铀的放射性强得多。
2.
We found that pitchblende contains at least two radioactive materials , one of which , accompanying bismuth , has been given the name polonium , while the other , paired with barium , has been called radium 我们发现沥青铀矿物中至少含有两种放射性物质：与铋伴生的命名为钋，与钡伴生的命名为镭。
3.
But an unexpected fact was noted : certain minerals ( pitchblende , chalcolite , autunite ) had a greater activity than might be expected on the basis of their uranium or thorium content 但是一个意外的事实引起了我的注意：某些矿物质(沥青铀矿物质、铜铀云母或钙铀云母)的活性比根据其铀或针含量所判断的要高。
4.
In reality the proportion of the hypothetical element was far lower and it took several years to show unequivocally that pitchblende contains at least one highly - radioactive material which is a new element in the sense that chemistry attaches to the term 实际上这种假设中的元素的浓度要小得多，我们花了几年时间才明确无误地证明沥青铀矿物质中至少含有一种高放射性物质，在化学意义上这就是一种新元素。
