General Information:
Chemical Formula:Fe++CO3
Composition:(Molecular Weight = 115.86 gm)Iron 48.20 %
FeCarbon 10.37 %
C Oxygen 41.43 %
O Empirical Formula: Fe2+(CO3)
IMA Status:Approved IMA 1960
Name Origin:From the Greek sideros - "iron."
Physical Properties: Cleavage:[1011] Perfect, [1011] Perfect, [1011] Perfect
Color:yellowish brown, brown, gray, yellowish gray, or greenish gray.
Density:3.96
Diaphaniety:Translucent to subtranslucent
Habits:Tabular - Form dimensions are thin in one direction., Massive - Uniformly indistinguishable crystals forming large masses., Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Hardness:3.5 - Copper Penny
Luminescence:None.
Luster:Vitreous (Glassy)
Streak:white
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