Asselbornite

asselbornite

metauranospinite

uranophane

uranosphaerite

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

Hydrothermal 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

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