underthescopemineral: Goethite, Uranocirciteα-Fe3+O(OH), Ba(UO2)2(PO4)2·10H
underthescopemineral: Goethite, Uranocirciteα-Fe3+O(OH), Ba(UO2)2(PO4)2·10H2O Locality:Krunkelbach Valley Uranium deposit, Menzenschwand, Black Forest, Baden-Württemberg, GermanyField of view: 3,2mmPhoto by etalonUranocircite or Uranocircite-II is a uranium mineral. It is a phosphate mineral which contains barium and is a green to yellow colour. It has a Mohs hardness of about 2. Uranocircite was named after the Greek for “falcon” because it was discovered in Falkenstein, Germany. Uranocircite contains about 45% uranium in it and is mainly mined in Bergen in Saxony, Germany.Goethite is a common mineral, and is a frequent matrix material for other more aesthetic minerals. It is usually a dark, uninteresting mineral, though specimens from a handful of locations are remarkable for their delicate and beautiful crystal growths. -- source link