Goethite - angew. Mineralogie

Goethite
IV - Hydroxides

`Name`		`Goethite`
`Chemistry`		`FeOOH (`a`-FeOOH)`
`Hardness`		`5 - 5.5`
`Lustre`		`adamantine - silky`
`Colour`		`light yellow to black brown`
`Streak`		`brown yellow to yellow`
`Density [g/cm³]`		`4.3`
`Crystal habit`		`orthorhombic, crystals acicular to fibrous`
`Cleavage, Fracture`		`[010] perfect`
`other characteristics and occurrences`		`in radial or fibrous aggregates, dense, massive, earthy, reniform, most limonite is made up by goethite`

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