Nesosilicate (insular SiO4 groups), uranium mineral
Specific gravity: 3.83 to 3.90
Hardness: 2½ to 3
Streak: Yellowish white
Colour: Light yellow, lemon-yellow, honey-yellow, straw-yellow, green-yellow
Uranophane occurs in pegmatites, and as an alteration product of uraninite in oxidised
uranium deposits (Dana, Webmin). It is the most common uranium silicate mineral, and occurs at practically every locality
where pitchblende is found (AM 40.634, HOM). Uranophane is associated with other
secondary uranium minerals, including
meta-autunite, phosphuranylite and
(AM 40.634, HOM).
The type Locality is Miedzianka, Gmina Janowice Wielkie, Jelenia Góra Co, Lower Silesian Voivodeship, Poland.
At Shaba, Zaire, uranophane occurs as pseudomorphs after uraninite and in association with kasolite, rutherfordine and less commonly soddyite (Dana).
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