pitchblende

1.uraninite in massive form is called pitchblende which is the chief uranium ore.

块状晶质铀矿称为沥青铀矿，是主要铀矿石。

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.

们发现沥青铀矿物中至少含有两种放射性物质：与铋伴生命名为钋，与钡伴生命名为镭。

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.

但是一个意外事实引起了意：某些矿物质(青铀矿物质、铀云母或钙铀云母)活性比根据其铀或针含量所判断要高。