Iron ochre

Iron ochre or iron ocher (, pale yellow, orange) is one of several minerals found in iron ore.

Description

The term iron ochre, primarily used among mineral collectors, geologists, miners, and various other related professions, one of several iron ore minerals, Common abrasives and pigments with a red-brown or brown-orange hue and the powdery consistency of ochre, were known under this name. The minerals include:

• hematite — Fe₂O₃, a widespread iron mineral, one of the most important iron ores
• limonite — Fe₂O₃·Н₂О, a mixture of secondary natural minerals, iron oxide hydrates
• goethite — α-FeO(OH), a product of weathering of ores, a secondary iron mineral, the main component of limonite, part of brown iron ores
• lepidocrocite (also known as "brown iron ochre") — γ-FeO(OH), a secondary mineral, a product of the oxidation of iron ore minerals, found in brown iron ores
• ferric oxide — Fe₂O₃ (oxides of iron), which also occurs naturally as the mineral magnetite
• ferrihydrite — Fe₂O₃·0.5H₂O, is a widespread hydrous ferric oxyhydroxide mineral at the Earth's surface

Gallery

References

See also

• Ochre
• Ochre (disambiguation)
• Iron (disambiguation)
• Iron(III) oxide
• List of inorganic pigments
• Red pigments
• List of colors
• Lead ochres
• Antimony ochres
• Cobalt ochres
• Yellow