Sturmanite

Ca6(Fe,Al,Mn)2SO4[B(OH)4](OH)12.25H2O

This sample of sturmanite is displayed in the Smithsonian Museum of Natural History. Sturmanite is a sulphate mineral which contains boron. It has the composition Ca6(Fe,Al,Mn)2SO4[B(OH)4](OH)12.25H2O. This sample is about 3 cm wide and is from N'Chwaning mine, Hotazel, Cape Province, South Africa.

Mindat: Sturmanite

Minerals
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