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.
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。
3.
To explain this point i prepared synthetic chalcolite from pure products , and obtained crystals , whose activity was completely consistent with their uranium content ; this activity is about half that of uranium 为了解释这一现象，我准备了从纯产品中合成的铜铀云母，并得到了这种结晶体，其活性与其铀含量完全一致，活性大约是铀的活性的一半。
