Iron ochre
| Iron ochre | |
|---|---|
| General | |
| Category | Minerals |
Iron ochre or iron ocher (Ancient Greek: ὠχρός, 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,[1]: 134 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[2]: 85 — Fe2O3,[3]: 212 a widespread iron mineral, one of the most important iron ores
- limonite[2]: 85 — Fe2O3·Н2О,[4]: 30 a mixture of secondary natural minerals, iron oxide hydrates
- goethite[4]: 30 — 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),[5]: 236 a secondary mineral, a product of the oxidation of iron ore minerals, found in brown iron ores
- ferric oxide[3]: 212 — Fe2O3 (oxides of iron), which also occurs naturally as the mineral magnetite
- ferrihydrite[6]: 338 — Fe2O3·0.5H2O, is a widespread hydrous ferric oxyhydroxide mineral at the Earth's surface
Gallery
References
- ^ Krivovichev V. G. Mineralogical glossary. Scientific editor A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0
- ^ a b Thomas Egleston, Ph. D. Catalogue of Minerals and Synonyms. — Washington: Government Printing Office, 1887.
- ^ a b Sigvald Linné. Archaeological Researches at Teotihuacan, Mexico. Sigvald Linne, with a foreword by Staffan Brunius and introduction by George L. — The University of Alabama Press, 2003. — 236p.
- ^ a b Kimmo Virtanen. Geological control of iron and phosphorus precipitates in mires of the Ruukki-Vihanti Area, Central Finland. — Geological Survey of Finland, 1994; — 69 p.
- ^ R. A. Lidin, L. L. Andreeva, V. A. Molochko, edited by R. A. Lidin. Constants of inorganic substances: reference book. 3-rd ed., stereotypical. — Moscow: Drofa, 2008 г. — 685 p.
- ^ A.M.O. Mohamed. Principles and Applications of Time Domain Electrometry in Geoenvironmental Engineering. — Taylor & Francis, 2006. — 603 p.