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Goethite (/ˈɡɜːrtaɪt/, US also /ˈɡoʊθaɪt/) is a
mineral of the
diaspore group,
consisting of iron(III) oxide-hydroxide,
specifically the α-polymorph. It...
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within the
matrix that
control goethite crystal size and shape.
Because of this, the main
factor influencing goethite crystal growth is the
chitin fibers...
- drab
colored ferric hydroxides.
These ferric hydroxides commonly include goethite (FeO-OH) and so-called "amorphous
ferric hydroxide" or limonite. Much of...
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different minerals (polymorphs)
denoted by the Gr****
letters α, β, γ and δ.
Goethite, α-FeO(OH), has been used as an
ochre pigment since prehistoric times....
- the form of
magnetite (Fe 3O 4, 72.4% Fe),
hematite (Fe 2O 3, 69.9% Fe),
goethite (FeO(OH), 62.9% Fe),
limonite (FeO(OH)·n(H2O), 55% Fe), or
siderite (FeCO3...
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Sphalerite 4 Iron 4–4.5
Ordinary steel 4.5
Colemanite 5
Apatite 5-5.5
Goethite 5.5 Gl**** 5.5–6 Opal 6
Rhodium 6-6.5
Rutile 6.5
Silicon 6.5–7
Jadeite 7...
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boehmite (γ-AlO(OH)) and
diaspore (α-AlO(OH)),
mixed with the two iron
oxides goethite (FeO(OH)) and
haematite (Fe2O3), the
aluminium clay
mineral kaolinite (Al2Si2O5(OH)4)...
- Mars
comes from the
detection of
specific minerals such as
hematite and
goethite, both of
which sometimes form in the
presence of water. In 2004, Opportunity...
- and
iridescence of fire
agates is due to
inclusions of the iron
oxides goethite or limonite. "Fire
Agate gemstone information". www.gemdat.org. Retrieved...
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crystals transformed into limonite, a
compact mixture of iron
oxides where goethite generally predominates, are common. In some cases, only
partial replacement...
