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Formula: Ca(UO2)2(AsO4)2.10H2O
Hydrated normal arsenate, uranyl
mineral,
autunite group. Uranospinite may contain a parallel core of
zeunerite, on which it is epitaxial
(Mindat).
Crystal System: Tetragonal
Specific gravity: 3.45 measured, 3.30 calculated
Hardness: 2 to 3
Streak: Very pale yellow
Colour: Yellow, lemon-yellow to greenish yellow
RADIOACTIVE
Environments
Uranospinite is a secondary mineral occurring in the
oxidised zone of arsenic- and
uranium- bearing hydrothermal deposits
(Mindat, HOM).
Localities
At the type locality, the Walpurgis Flacher vein, Weißer Hirsch Mine, Neustädtel, Schneeberg, Erzgebirgskreis,
Saxony, Germany,
uranospinite has been found associated with metazeunerite,
metauranocircite,
uranophane,
trögerite, walpurgite,
uranosphaerite and
asselbornite
(HOM, Mindat, AM 38.1159-1168).
At the Cherkasar deposit, Uzbekistan, uranospinite has been found with
schoepite,
paraschoepite,
arsenuranylite,
metazeunerite and
nováčekite
(HOM).
Alteration
Uranospinite is an alteration product of uraninite
(Webmin). It may dehydrate
to metauranospinite
(Mindat).
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