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Formula: Zn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2
[(Si,As5+)O4]10
Compound arsenate,
hematolite group,
manganese-bearing mineral
Specific gravity: 3.876
Hardness: 3 to 4
Streak: Golden brown
Colour: Deep copper brown
Common impurities: Al,H2O
Environments:
Metamorphic environments
Hydrothermal environments
Localities
The type locality is the Sterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA.
Kraisslite occurs as a secondary mineral in micaceous
veinlets and fracture fillings in
the zincite zone of a metamorphosed
zinc deposit,
(Dana, Webmin)
associated with zincite, willemite,
sussexite, sphalerite,
rhodochrosite, pyrochroite,
franklinite, baryte and
austinite
(Mindat, AM63.938).
Kraisslite from the Sterling Mine -
Image
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