General Information:
Chemical Formula:
Fe+++O(OH)
Composition:
(Molecular Weight = 88.85 gm)
Iron 62.85 % Fe
Hydrogen 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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