Goethite [ FeO(OH) ]

Image of Goethite

Material properties

Formulas FeOOH, FeO(OH)
Abbreviation Gth
IMA Status Approved (IMA 1980 s.p.)
Crystal symmetry Orthorhombic, Point group mmm
Classifications Minerals containing OH, Iron oxide/hydroxide, Diaspore (group)
Variant Al
Related materials Feroxyhyte, Lepidocrocite
Reflectance lines H2O, H-O-H, OH
Search other databases webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Tags Hydroxide, Mineral

Composition

Element Atoms
H 1
Fe 1
O 2
Total: 4

Specimens of Goethite

Name Owner Materials Phase purity Image
M2063 Gaspéite CSIRO Gaspéite, Goethite (8.3%), Hematite, Magnesite, Reevesite 8.3
M2237 Azurite CSIRO Azurite, Delafossite, Goethite (var. Al) (7.7%), Hematite, Malachite, Quartz 7.7
M0930 Azurite CSIRO Azurite, Goethite (var. Al) (6.7%), Hematite, Hoganite, Quartz 6.7
M2456 Jarosite CSIRO Goethite (5.8%), Jarosite, Natrojarosite, Quartz 5.8
M2333 Tourmaline CSIRO Cassiterite, Goethite (5.4%), Quartz, Schorl, Topaz 5.4
M0301 Chalcocite CSIRO Bornite, Chalcocite (var. low), Chalcocite (var. high), Chalcocite-Digenite Group, Cuprite, Djurleite, Goethite (4.5%), Malachite, Pyrite 4.5
M2753 Azurite CSIRO Azurite, Goethite (var. Al) (3.5%), Muscovite, Muscovite-1M, Muscovite-2M1, Quartz 3.5
Swa-1 Ferruginous smectite CSIRO Goethite (2.3%), Montmorillonite (var. Fe), Quartz, Smectite (var. Fe) 2.3
M1357 Tourmaline CSIRO Gibbsite, Goethite (1.6%), Muscovite-2M1, Quartz, Schorl 1.6
MT8388a Palygorskite CSIRO Goethite (1.6%), Montmorillonite, Palygorskite, Quartz 1.6
PF1-1 Palygorskite CSIRO Fluor-elbaite, Goethite (1.3%), Montmorillonite, Palygorskite, Quartz 1.3
API 33a Nontronite CSIRO Goethite (1.1%), Nontronite 1.1