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Formula: Pb(UO2)4(BiO)3(AsO4)2(OH)7.4H2O
Hydrated arsenate containing hydroxyl,
bismuth-bearing and uranyl mineral
Crystal System: Isometric
Specific gravity: 5.7 calculated
Hardness: 3
Streak: Lemon
Colour: Brown to lemon-yellow
Solubility: Slowly soluble in dilute hydrochloric acid
RADIOACTIVE
Environments
Localities
At the type locality, the Walpurgis Flacher vein, Weißer Hirsch Mine, Neustädtel, Schneeberg, Erzgebirgskreis, Saxony,
Germany, asselbornite was found initially on a museum specimen, and later from a specimen at the
locality as well formed translucent brown to lemon-yellow cubic crystals to 0.3 mm. Associated minerals include
metauranospinite,
uranophane,
uranosphaerite and quartz
(AM 69.565-569).
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