pitchblende's Usage Examples:

artificial pitchblende, which serves as a starting-point for the preparation of uranium compounds.

the emission of rays like those just mentioned - as a property of some undiscovered substance, submitted pitchblende to a most careful analysis.

The only practically available raw material for 'the extraction of uranium is pitchblende (q.

and Mme Curie subjected a large amount of pitchblende to a laborious process of fractionation, with the result that in 1898 they announced the existence in it of two highly radioactive substances, polonium and radium.

To extract the metal, the pitchblende is first roasted in order to remove the arsenic and sulphur.

2662) showed that the Joachimsthal pitchblende yields tellurium and a minute quantity of the strongly radioactive polonium which is precipitated by bismuth (see Radioactivity).

Pure pitchblende is U308, which, in relatively good specimens, forms some 80% or more of the whole.

Klaproth's detection of a previously unknown constituent of the mineral pitchblende.

In 1789 Klaproth isolated from pitchblende a yellow oxide which he viewed as the oxide of a new metal, which he named uranium, after the newly discovered planet of Herschel.

Pitchblende >>To extract the metal, the pitchblende is first roasted in order to remove the arsenic and sulphur.