General Information:
Chemical Formula:NaFe+++3(SO4)2(OH)6
Composition:(Molecular Weight = 484.70 gm)Sodium 4.74 %
NaIron 34.57 %
FeHydrogen 1.25 %
H Sulfur 13.23 %
S Oxygen 46.21 %
O Empirical Formula: NaFe2+3(SO4)2(OH)6
Name Origin:Named after its chemical composition and similarity to Jarosite.
Physical Properties: Cleavage:[0001] Perfect
Color:yellow, ochre yellow, or ochre brown.
Density:2.9 - 3.3, Average = 3.09
Diaphaniety:Transparent to Translucent
Habits:Crystalline - Fine - Occurs as well-formed fine sized crystals., Fibrous - Crystals made up of fibers., Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:2.5-3.5 - Finger Nail-Copper Penny
Luminescence:None.
Luster:Vitreous (Glassy)
Streak:light yellow
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