| Ca6(Fe,Al,Mn)2SO4[B(OH)4](OH)12.25H2O
Ca₆(Fe,Al,Mn)₂SO₄[B(OH)₄](OH)₁₂·0.25H₂O
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.
这种斯特曼石样品陈列在史密森尼自然历史博物馆中。斯特曼石是一种含硼的硫酸盐矿物。其化学式为Ca₆(Fe,Al,Mn)₂SO₄[B(OH)₄](OH)₁₂·25H₂O。该样品宽约3厘米,采自南非开普省霍塔泽尔的N'Chwaning矿。
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