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goethite

Overview page. Subjects: Earth Sciences and Geography — Chemistry.

A hydrous iron oxide, α-FeO(OH), which forms a series with lepidocrocite, ˠ-FeO(OH); sp. gr. 4.0; hardness 5; reddish-brown; massive or earthy; occurs as an alteration product of...

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goethite

Overview page. Subjects: Earth Sciences and Geography — Chemistry.

A hydrous iron oxide, α-FeO(OH), which forms a series with lepidocrocite, ˠ-FeO(OH); sp. gr. 4.0; hardness 5; reddish-brown; massive or earthy; occurs as an alteration product of...

See overview in Oxford Index

goethite

Edited by John Daintith.

in A Dictionary of Chemistry

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Chemistry. 55 words.

A yellow-brown mineral, FeO.OH, crystallizing in the orthorhombic system. It is formed as a result of the oxidation and hydration

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goethite

Edited by Richard Rennie and Jonathan Law.

in A Dictionary of Chemistry

January 2016; p ublished online January 2016 .

Reference Entry. Subjects: Chemistry. 56 words.

A yellow-brown mineral, FeO.OH, crystallizing in the orthorhombic system. It is formed as a result of the oxidation and hydration of iron minerals or as a direct precipitate from marine or...

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goethite

Edited by MICHAEL ALLABY.

in A Dictionary of Earth Sciences

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Earth Sciences and Geography. 46 words.

A hydrous iron oxide, α-FeO(OH), which forms a series with lepidocrocite, ˠ-FeO(OH); sp. gr. 4.0; hardness 5; reddish-brown; massive or

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goethite

Michael Allaby.

in A Dictionary of Geology and Earth Sciences

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Earth Sciences and Geography. 51 words.

A hydrous iron oxide, α-FeO(OH), which forms a series with lepidocrocite, γ-FeO(OH); sp. gr. 4.0; *hardness 5; reddish-brown; *...

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Quantification of Al-goethite from diffuse reflectance spectroscopy and magnetic methods

Zhaoxia Jiang, Qingsong Liu, Claudio Colombo, Vidal Barrón, José Torrent and Pengxiang Hu.

in Geophysical Journal International

January 2014; p ublished online October 2013 .

Journal Article. Subjects: Geophysics. 6901 words.

As one of the most abundant iron oxides in soils, the presence and nature of goethite is controlled by the soil conditions and burial history. The visible diffuse reflectance spectroscopy...

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Magnetism in non-stoichiometric goethite of varying total water content and surface area

C. A. Barrero, J. D. Betancur, J. M. Greneche, G. F. Goya and T. S. Berquó.

in Geophysical Journal International

February 2006; p ublished online February 2006 .

Journal Article. Subjects: Geophysics. 6889 words.

Summary

In this work, the magnetic properties of four non-stoichiometric goethites with varying total water content and surface area have been investigated....

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Authigenic magnetite formation from goethite and hematite and chemical remanent magnetization acquisition

J L Till and N Nowaczyk.

in Geophysical Journal International

P ublished online March 2018 .

Journal Article. Subjects: Geophysics. 9719 words.

Summary

The iron oxyhydroxide goethite is unstable at elevated temperatures and can transform to magnetite under reducing conditions. In this study, various...

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Magnetic properties and anisotropy constant of goethite single crystals at saturating high fields

F. Martin-Hernandez and M. M. García-Hernández.

in Geophysical Journal International

May 2010; p ublished online May 2010 .

Journal Article. Subjects: Geophysics. 4287 words.

Summary

The applied fields in previous studies of goethite's magnetic properties were often not sufficiently high to reach reversible magnetization behaviour...

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Thermomagnetic behaviour of haematite and goethite as a function of grain size in various non-saturating magnetic fields

Cor B. de Boer and Mark J. Dekkers.

in Geophysical Journal International

June 1998; p ublished online June 1998 .

Journal Article. Subjects: Geophysics. 0 words.

SUMMARY

When interpreting thermomagnetic curves of non-saturated magnetic minerals, irreversible heating and cooling curves need not necessarily imply...

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limonite

Edited by John Daintith.

in A Dictionary of Chemistry

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Chemistry. 70 words.

A generic term for a group of hydrous iron oxides, mostly amorphous. *Goethite and *haematite are important constituents,

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limonite

Edited by Richard Rennie and Jonathan Law.

in A Dictionary of Chemistry

January 2016; p ublished online January 2016 .

Reference Entry. Subjects: Chemistry. 73 words.

A generic term for a group of hydrous iron oxides, mostly amorphous. *Goethite and *haematite are important constituents, together with colloidal silica, clays, and manganese oxides....

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Thermomagnetic measurements of soil iron minerals: the role of organic carbon

M. Hanesch, H. Stanjek and N. Petersen.

in Geophysical Journal International

April 2006; p ublished online April 2006 .

Journal Article. Subjects: Geophysics. 4495 words.

Summary

Thermomagnetic measurements, particularly measurements of the Curie or Néel temperature, are often used to identify magnetic minerals in rocks or...

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Magnetic and diffuse reflectance spectroscopic characterization of iron oxides in the tidal flat sequence from the coastal plain of Jiangsu Province, China

Yan Dong, Weiguo Zhang, Chenyin Dong, Can Ge and Lizhong Yu.

in Geophysical Journal International

January 2014; p ublished online October 2013 .

Journal Article. Subjects: Geophysics. 7644 words.

In this paper, we present the results of research on a coastal lowland Holocene tidal flat sequence in order to explore the variations in magnetic mineralogy during the process of tidal...

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Magnetic properties of Dashing Rocks loess at Timaru, South Island, New Zealand

Mingming Ma, Xiuming Liu, Brad J. Pillans, Shouyun Hu, Bin Lü and Huifeng Liu.

in Geophysical Journal International

October 2013; p ublished online July 2013 .

Journal Article. Subjects: Geophysics. 7056 words.

The relationships between magnetic susceptibility and pedogenic development are different in various regions of the world. For example, loess magnetic susceptibility shows a positive...

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manganite

Overview page. Subjects: Earth Sciences and Geography.

Mineral, MnO2Mn(OH)2; sp. gr. 4.2–4.4; hardness 3–4; monoclinic; dark steel-grey to black; reddish-brown to black streak; sub-metallic lustre; crystals prismatic with striated faces, often...

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Remagnetization of Mesozoic limestones from the Jaisalmer basin, NW India

T. H. Torsvik, M. K. Pandit, T. F. Redfield, L. D. Ashwal and S. J. Webb.

in Geophysical Journal International

April 2005; p ublished online April 2005 .

Journal Article. Subjects: Geophysics. 3276 words.

Summary

High coercivity but low unblocking (LB) temperature components (∼80–100 °C) demonstrate that goethite is the principal carrier of the natural...

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Magnetostratigraphy and sedimentary evolution of the late Miocene to early Pleistocene sediments, Quseir region, Egyptian Red Sea

Candida B. Lean, Mark W. Hounslow, Fred J. Vine, Gill M. Harwood, Liz Elvidge, Kevin Fisk, Alan C. Kendall and Paul Montgomery.

in Geophysical Journal International

May 1998; p ublished online May 1998 .

Journal Article. Subjects: Geophysics. 8484 words.

An integrated sedimentological and magnetostratigraphic study has allowed a detailed understanding of the late Miocene to early Pleistocene evolution of the sediments in the Quseir region...

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The magnetism of a glacial aeolianite sequence from Lanzarote (Canary Islands): coupling between luvic calcisol formation and Saharan dust trapping processes during wet deposition events off northwestern Sahara

David Williamson, Mike Jackson, Subir K. Banerjee and Nicole Petit-Maire.

in Geophysical Journal International

June 2004; p ublished online June 2004 .

Journal Article. Subjects: Geophysics. 8903 words.

Summary

In order to better document the climatic origin of pedogenized loess deposits west of Sahara, rock-magnetic measurements were performed on a Last...

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Combined Single-Drop and Rotating Drum Dustiness Test of Fine to Nanosize Powders Using a Small Drum

Thomas Schneider and Keld Alstrup Jensen.

in The Annals of Occupational Hygiene

January 2008; p ublished online December 2007 .

Journal Article. Subjects: Occupational Medicine. 7007 words.

A dustiness test has been developed that performs both a single-drop and a continuous rotation test using a 6-g sample. Tests were completed on pigment-grade and ultrafine TiO2, two grades...

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