Goethite [ FeO(OH) ]

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
M0310 Goethite CSIRO Goethite (99.6%) 99.6
M0760 Goethite CSIRO Goethite (99.5%) 99.5
M0773 Goethite CSIRO Goethite (99.2%) 99.2
M0791 Goethite CSIRO Goethite (99.2%) 99.2
M0781 Goethite CSIRO Goethite (98.6%), Quartz 98.6
M0652 Goethite CSIRO Goethite (92.0%), Muscovite-2M1, Quartz 92.0
M0765 Goethite CSIRO Goethite (91.9%), Kaolinite, Quartz 91.9
M0776 Goethite CSIRO Goethite (81.3%), Magnetite, Quartz 81.3
MT8364 Lepidocrocite CSIRO Goethite (79.8%), Lepidocrocite 79.8
M2229 Goethite CSIRO Goethite (76.7%), Hematite, Quartz 76.7
M0774 Goethite CSIRO Goethite (75.1%), Microcline, Muscovite, Muscovite-1M, Muscovite-2M1, Quartz 75.1
M0762 Goethite CSIRO Goethite (74.2%), Kaolinite, Muscovite-1M, Muscovite-2M1, Orthoclase, Quartz 74.2
M2757 Goethite CSIRO Akaganeite, Goethite (72.6%) 72.6
M0891 Chrysocolla CSIRO Chrysocolla, Goethite (66.8%), Hematite, Microcline, Montmorillonite, Quartz 66.8
M2783 Goethite CSIRO Cassiterite, Goethite (58.7%), Quartz 58.7
M2728 Goethite CSIRO Calcite, Goethite (56.1%), Hematite, Siderite 56.1
M1646 Chrysocolla CSIRO Chrysocolla, Goethite (53.8%), Hematite, Malachite, Montmorillonite, Quartz 53.8
M0656 Cuprite CSIRO Clinochlore (var. Fe), Cuprite, Fluorite, Goethite (49.6%), Hematite, Malachite, Quartz 49.6
M0777 Goethite CSIRO Goethite (44.3%), Hematite, Quartz 44.3
M0945 Chrysocolla CSIRO Chrysocolla, Cuprite, Goethite (18.6%), Malachite, Microcline, Quartz 18.6
M2803 Chrysocolla and Malachite CSIRO Chrysocolla, Goethite (18.3%), Hematite, Malachite, Montmorillonite, Quartz 18.3
M0801 Hematite CSIRO Goethite (14.8%), Hematite, Quartz 14.8
M2032 Malachite CSIRO Goethite (12.3%), Hematite, Malachite, Quartz 12.3
M0764 Goethite CSIRO Goethite (11.9%), Hematite, Magnetite, Quartz 11.9
M2657 Chalcopyrite CSIRO Chalcopyrite, Goethite (9.6%), Jarosite, Marcasite, Pyrite 9.6