Formula: Mg5(AsO4)2(AsO3OH)2.10H2O
Hydrated hydrogen arsenate,
ondrušite group
Crystal System: Triclinic
Specific gravity: 2.94 measured, 2.93 calculated
Hardness: 2½ to 3
Streak: White
Colour: Rose, white, colourless
Solubility: Soluble in hydrochloric acid
Environments
Localities
At the type locality, the Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia, chudobaite occurs in a deep oxidation zone of a
dolostone-hosted hydrothermal polymetallic ore deposit as equant crystals to 5 mm
in size. Associated minerals include conichalcite,
copper-bearing
adamite, zinc-bearing
olivenite, ferrilotharmeyerite and
chalcocite
(AM 45.1130, HOM, Mindat).
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