Pitchblende

(n.) A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.

校对:马尔科姆

• There is (according to Soddy) about on e part of radium in five million parts of the best pitchblende, but the new element is about one million times more radio active than uranium. 李贝. 西洋科学史.
• In the chemical analysis of pitchblende mad e by Mme. 李贝. 西洋科学史.
• This discovery naturally led to further investigation, on the assumption that pitchblende contains more than one radioactive substance. 李贝. 西洋科学史.

伯特校对