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Formula: Na12Mg7(SO4)13.15H2O
Hydrated sulphate
Crystal System: Trigonal
Specific gravity: 2.374 to 2.423 measured, 2.35 calculated
Hardness: 2½ to 3
Colour: Colourless, reddish yellow; colourless in transmitted light
Solubility: Soluble in water
Environments
Evaporite deposits
Volcanic sublimates
Löweite is an uncommon mineral in marine salt deposits, in efflorescences and crusts in saline playa deposits
and a volcanic sublimation product. Associated minerals include anhydrite,
gypsum, vanthoffite,
blödite, langbeinite,
aphthitalite, epsomite,
pentahydrite, hexahydrite,
kieserite, mirabilite,
starkeyite and thénardite
(HOM).
Localities
At the type locality, Bad Ischler Salzberg, Perneck, Bad Ischl, Gmunden District, Upper Austria, Austria, Löweite
occurs in an oceanic salt deposit associated with anhydrite
(Mindat).
Loweite from Bad Ischler Salzberg -
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