Uraninite
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Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation typically contains variable proportions of
Pitchblende from Niederschlema-Alberoda deposit, Germany
Uraninite crystals from Topsham, Maine (size: 2.7 × 2.4 × 1.4 cm)
Radium
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Radium is a chemical element; it has symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, bu
Uraninite
…Johanngeorgenstadt deposit in Germany was used by M. Klaproth in 1789 to discover the element uranium. All uraninite minerals contain a small amount of radium as a radioactive decay product of uranium. Marie Skłodowska-Curie used pitchblende, processing tons of it herself, as the source material for her…
Radium electroplated on a very small sample of copper foil and covered with polyurethane to prevent reaction with the air
Radium-226 radiation source. Activity 3300 Bq (3.3 kBq)
Marie and Pierre Curie experimenting with radium, a drawing by André Castaigne
Glass tube of radium chloride kept by the US Bureau of Standards that served as the primary standard of radioactivity for the United States in 1927.