Iron ochre

Iron ochre
General
CategoryMineral
For other uses, see Ochre (disambiguation).
For other uses, see Iron (disambiguation).

Iron ochre or iron ocher (Ancient Greek: ὠχρός, pale yellow, orange) — at least three iron ore minerals,[1]: 134  common abrasives and pigments with a red-brown or brown-orange hue and the powdery consistency of ocher, were known under such a trivial name. The term “iron ocher” was primarily used among mineral collectors, geologists, miners and representatives of related craft professions. It may refer to:

  • Iron ochre or hematite[2]: 85  — Fe2O3,[3]: 212  a widespread iron mineral, one of the most important iron ores;
  • Iron ochre or limonite[2]: 85  — Fe2O3·Н2О,[4]: 30  a mixture of secondary natural minerals, iron oxide hydrates;
  • Iron ochre or goethite[4]: 30  — α-FeO(OH), a product of weathering of ores, a secondary iron mineral, the main component of limonite, is part of brown iron ores;
  • Iron ochre, brown iron ocher or lepidocrocite — γ-FeO(OH),[5]: 236  a secondary mineral, a product of the oxidation of iron ore minerals, found in brown iron ores;
  • Iron ochre or ferric oxide[3]: 212  — Fe2O3 (oxides of iron), which also occurs naturally as the mineral magnetite;
  • Iron ochre or ferrihydrite[6]: 338  — Fe2O3·0.5H2O, is a widespread hydrous ferric oxyhydroxide mineral at the Earth's surface;

References

  1. ^ 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
  2. ^ a b Thomas Egleston, Ph. D. Catalogue of Minerals and Synonyms. — Washington: Government Printing Office, 1887.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ A.M.O. Mohamed. Principles and Applications of Time Domain Electrometry in Geoenvironmental Engineering. — Taylor & Francis, 2006. — 603 p.

See also