Cuprosklodowskite
Cuprosklodowskite is a green uranium mineral that forms when older uranium minerals are altered. Its chemical formula is Cu(UO2)2(HSiO4)2·6H2O. It is a nesosilicate that commonly appears as grass‑green, needle‑like crystals or fibrous crusts and is strongly radioactive. It has a Mohs hardness of about 4, a density around 3.85, and a dull to silky luster.
The mineral crystallizes in the triclinic system and is typically found in radiating groups of acicular crystals. Cuprosklodowskite was discovered in 1933 at the Kalongwe deposit in Katanga, Belgian Congo (now the Democratic Republic of the Congo). It was named after the mistaken idea that it was the copper analogue of sklodowskite, which was named for Marie Skłodowska Curie. It occurs with other uranium minerals such as becquerelite, uranophane, and kasolite.
This page was last edited on 2 February 2026, at 18:27 (CET).