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Formula: ZnAl2(SO4)4.22H2O
Hydrated sulphate, halotrichite group,
zinc-bearing mineral
Crystal System: Monoclinic
Specific gravity: 1.85 calculated
Hardness: 2
Colour: White, brownish yellow, Off-white; colourless in transmitted light
Luminescence: Not fluoorescent under UV
Solubility: Soluble in water
Environments
Dietrichite is found as bright white fibrous efflorescences, usually a product of surface weathering
(Mindat).
Localities
At the type locality, the Baia Sprie mine, Baia Sprie, Maramureș County, Romania, dietrichite occurs as
post-mining efflorescences in the abandoned mine workings
(HOM).
Dietrichite from Baia Sprie - Image
At the Blue Lizard Mine, Red Canyon Mining District, San Juan County, Utah, USA,
bobcookite and
wetherillite occur together as
secondary alteration phases in association with
boyleite, chalcanthite,
dietrichite, gypsum,
hexahydrite, johannite,
pickeringite and rozenite
(MM 79.3.695–714).
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