Goethite (/ˈɡɜːrtaɪt/, US also /ˈɡoʊθaɪt/) is a mineral of the diaspore group, consisting of iron(III) oxide-hydroxide, specifically the α-polymorph. It...

within the matrix that control goethite crystal size and shape. Because of this, the main factor influencing goethite crystal growth is the chitin fibers...

different minerals (polymorphs) denoted by the Greek letters α, β, γ and δ. Goethite, α-FeO(OH), has been used as an ochre pigment since prehistoric times....

drab colored ferric hydroxides. These ferric hydroxides commonly include goethite (FeO-OH) and so-called "amorphous ferric hydroxide" or limonite. Much of...

crystals transformed into limonite, a compact mixture of iron oxides where goethite generally predominates, are common. In some cases, only partial replacement...

green or blue sheen. Oranges and browns are attributed to hematite or goethite. Because aventurine is a rock, its physical properties vary: its specific...

β-Fe2O3: beta phase γ-Fe2O3: gamma phase, maghemite ε-Fe2O3: epsilon phase goethite (α-FeOOH) akaganéite (β-FeOOH) lepidocrocite (γ-FeOOH) feroxyhyte (δ-FeOOH)...

Sphalerite 4 Iron 4–4.5 Ordinary steel 4.5 Colemanite 5 Apatite 5-5.5 Goethite 5.5 Glass 5.5–6 Opal 6 Rhodium 6-6.5 Rutile 6.5 Silicon 6.5–7 Jadeite 7...

In general, bog ores consist primarily of iron oxyhydroxides, commonly goethite (FeO(OH)). Iron-bearing groundwater typically emerges as a spring and the...

brown" is composed of a mixture of kaolin, quartz, goethite, and hematite, with the hematite and goethite (generally 60% of the content) determining the colour...