Hydrated normal phosphate, autunite group
Specific gravity: 3.40 to 3.63
Streak: Pale yellow to greenish white
Colour: Brownish yellow, olive-green, yellow, bronze-yellow
Bassetite is an uncommon secondary mineral occurring in the
oxidised zones of some uranium-bearing hydrothermal mineral deposits (Mindat, HOM).
Associated minerals include meta-autunite,
metanováčekite, saléeite and
At Arcu su Linnarbu, Italy, bassetite is associated with meta-autunite and torbernite (HOM).
At the type locality, Wheal Basset, Basset Mines, Carn Brea, Cornwall, England, UK, bassetite is associated with uranospathite, torbernite, uraninite and pyrite (Mindat, HOM) in a pyrite - uraninite vein (Dana).
At the Sue mine, Arizona, USA, bassetite is associated with saléeite and metanováčekite (HOM).
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