Carlosbarbosaite
Jaguaraçu pegmatite, Jaguaraçu, Minas Gerais, Brazil
Fibrous crystals of the brand new uranium mineral (approved Nov, 2010) Carlosbarbosaite from the the type and only locality, Jaguaracu, Minas Gerais, Brazil. The formula is (Ca0.5□0.5)(UO2)2(NbSi)O6(OH)2·2H2O. The discovery was very limited, about 100 specimens, all micros. The field of view in the photo is 2 mm wide.
© C. Stefano '11