DENVER, Col., May 20. -- What is regarded as the richest known deposit of pitchblende, from which radium is obtained, has been discovered in Colorado. L.G. Nesmith, a mine worker, is the owner.

THE source from which radium is obtained is the mineral pitchblende. This mineral occurs in veins, like the majority of useful metals; I may refer particularly to the mineral veins of Cornwall ...

While grinding up an even more radioactive substance known as pitchblende, she also discovered that it consisted of two elements that she dubbed radium and polonium. Curie's work revealed the ...

This is joined by another marker that is a combination of Uraninite, Pitchblende, Carnotite, Gummit, and Yellowcake. Interesting story, Tritium is highly regulated in this country but it is ...

Its discovery in 1789 in the mineral pitchblende (or uraninite) is credited to the German chemist Martin Heinrich Klaproth who named it after the planet Uranus, itself only discovered eight years ...

Working with her husband Pierre, Marie Curie was studying pitchblende, a mineral from North Bohemia that contained uranium. Pitchblende was mined near what's now Jachymov in the Czech Republic, and ...

wrenched by such determined labor and consummate skill from tons of black shapeless pitchblende. On his return to Paris he was one day demonstrating in his lecture room with this precious tube the ...

Five years later, he reported that a sample of African pitchblende contained about 2 × 10 −10 grams of 99 Tc per kilogram of ore. In 1962, a team of French scientists confirmed Kuroda's earlier ...

As the climate warms and Arctic permafrost thaws, some of the toxic elements locked away in it are starting to emerge and could contaminate the water supplies that many northern communities rely on.

铀矿石主要指含有一定浓度的铀元素且具有经济开采价值的矿物类型。铀矿石在自然界中存在多种矿物形式，通常伴随着其他金属和非金属元素，并具有各种不同的晶体形状和颜色。以下是一些主要的铀矿石种类及其外观特征。

While grinding up an even more radioactive substance known as pitchblende, she also discovered that it consisted of two elements that she dubbed radium and polonium. Curie's work revealed the nature ...