General Information:
Chemical Formula:
NaFe+++3(SO4)2(OH)6
Composition:
(Molecular Weight = 484.70 gm)
Sodium 4.74 % Na
Iron 34.57 % Fe
Hydrogen 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
More details...