Images
Formula:
Pb(U6+O2)4(BiO)3(AsO4)2(OH)7.4H2O
Hydrated arsenate, uranyl- and
bismuth- bearing 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).
Asselbornite from the Walpurgis Flacher vein -
Image
Back to Minerals