Goethite
Goethite
(FeO(OH)), named after
the German polymath Johann Wolfgang von
Goethe, is an iron bearing oxide
mineral found in soil and other
low-temperature environments. Goethite
has been well known since prehistoric
times for its use as a pigment. Evidence
has been found of its use in paint
pigment samples taken from the caves
of Lascaux in France. It was first
described in 1806 for occurrences in
the Hollertszug Mine, Dermbach, Herdorf,
Siegerland, Rhineland-Palatinate,
Germany.
In
2003, nanoparticulate authigenic
goethite was shown to be the most common
diagenetic iron oxyhydroxide in
both marine and lake sediments.
Goethite
is generally a replacement
mineral and can be found replacing
pyrite cubes and even gypsum
stalactites.
In massive form Goethite can resemble
Limonite and Hematite
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