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Coutinhoite: ThxBa1-2x(H2O)y(UO2)2Si5O13·H2O
Comments: New mineral, IMA 2003-025, from this pegmatite. This is a co-type specimen. Flaky crystals of choutinhoite to less than 0.25mm in gelatin capsule. Location: Lavra do Urucum, Serra do Urucum, Galileia, Minas Gerais, Brazil. Scale: Crystal size 0.25mm. © Tom Loomis / Dakota Matrix
Comments: Irregular aggregate of yellow coutinhoite. (AmMin, v 89, p 721). Location: Urucum mine, Galiléia, Minas Gerais, Brazil. Scale: See Image. © American Mineralogist