Iron(III) oxide-hydroxide

FeO(OH)

Iron(III) oxide-hydroxide - FeO(OH)Iron(III) oxide-hydroxide - FeO(OH)Iron(III) oxide-hydroxide - FeO(OH)Iron(III) oxide-hydroxide - FeO(OH)Iron(III) oxide-hydroxide - FeO(OH)
Chemical name
Iron(III) oxide-hydroxide
Mineral name
Goethite
Chemical formula
FeO(OH)
Melting point [°C]
> 180
Crystal system
orhorhombic
Crystal Class
orthorhombic-dipyramidal (2/m 2/m 2/m)
Space Group
Pbnm
Unit cell
a [Å]:4.65
b [Å]:10.02
c [Å]:3.04
Molecular weight [g/mol]
88.85
Formula units
Z=4
Mohs hardness
5 - 5.5
Density [g/cm3]
4.25
Color
Vivid, dark orange, opaque crystals
Refractive Index
Opaque to sub-translucen
Solubility in water
insoluble at pH 7