General Information:
Chemical Formula:Fe+++O(OH)
Composition:(Molecular Weight = 88.85 gm)Iron 62.85 %
FeHydrogen 1.13 %
H Oxygen 36.01 %
O Empirical Formula: Fe3+OOH
Environment:Deep ocean (high pressure, low temperature, saltwater). Alters spontaeously to geothite on exposure to air.
IMA Status:Approved IMA 1976
Locality:Pacific ocean Fe-Mn nodules.
Name Origin:Named for the composition (Ferric, Oxygen, Hydroxide).
Physical Properties: Color:brown.
Density:4.2
Diaphaniety:Opaque
Habits:Massive - Uniformly indistinguishable crystals forming large masses., Nodular - Tuberose forms having irregular protuberances over the surface., Concretionary - Rounded massive fine-g rained materials.
Streak:yellow
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