Formula :
(Mn2+,Zn,Fe2+)[SO4] * 4 H2O
System: monoclinic Hardness:2-3 Rarity:extremely rare
Strunz id:VI/C.3-30 -
SULFATES, CHROMATES, MOLYBDATES and TUNGSTATES
Name origin: Named in honor of Malvern Wells Iles (7 August 1852, Midway, Kentucky, USA - 9 January 1937, San Francisco, California, USA), a metallurgist active in Denver, Colorado, USA who first described the mineral.
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