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Quenstedtite
General
Category	sulfate minerals
Formula (repeating unit)	Fe2(SO4)3·11H2O
IMA symbol	Qst
Strunz classification	7.CB.65
Crystal system	Triclinic
Crystal class	Pinacoidal (1) (same H-M symbol)
Space group	P1
Unit cell	a = 6.184 Å, b = 23.6 Å c = 6.539 Å; α = 94.18° β = 101.73°, γ = 96.27°; Z = 2
Identification
Color	white to very pale violet to red-violet
References

Quenstedtite is an uncommon iron sulfate mineral with chemical formula Fe₂(SO₄)₃·11H₂O. It forms violet or white triclinic crystals. Found in oxidized zones of pyrite-rich orebodies, especially in arid climates. It was first reported in 1888 for an occurrence in Tierra Amarilla, Copiapó Province, Atacama Region, Chile and named by G. Linck in 1889 for the German mineralogist F. A. von Quenstedt (1809–1889).

References

1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. doi:10.1180/mgm.2021.43. S2CID 235729616.
2. ^ Mindat
3. Handbook of Mineralogy

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