Goethite (/ˈɡɜːrtaɪt/, US also /ˈɡoʊθaɪt/) is a mineral of the diaspore group, consisting of iron(III) oxide-hydroxide, specifically the α-polymorph. It...
17 KB (1,689 words) - 12:12, 26 February 2024
within the matrix that control goethite crystal size and shape. Because of this, the main factor influencing goethite crystal growth is the chitin fibers...
32 KB (4,119 words) - 19:47, 9 September 2024
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....
11 KB (1,227 words) - 00:12, 10 June 2024
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)...
10 KB (967 words) - 03:38, 19 August 2024
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...
12 KB (1,166 words) - 03:53, 8 September 2024
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...
16 KB (1,110 words) - 00:26, 16 September 2024
green or blue sheen. Oranges and browns are attributed to hematite or goethite. Because aventurine is a rock, its physical properties vary: its specific...
3 KB (429 words) - 16:36, 9 June 2024
processes in soil, and along with other iron oxides or oxyhydroxides such as goethite, which is responsible for the red color of many tropical, ancient, or otherwise...
23 KB (2,343 words) - 14:08, 16 September 2024
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...
55 KB (7,043 words) - 16:31, 16 September 2024
