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Goethite
FeO(OH)

     Goethite is uncommon at Mont Saint-Hilaire, and of little interest
due to its habits.

PHYSICAL CHARACTERISTICS:

Color varies from brown to reddish brown and black.
Luster is earthy.
Diaphaneity is opaque.
Crystal System is orthorhombic; Pnma.
Crystal Habits include powdery masses and as pseudomorphs
   after siderite.
Cleavage {010} is perfect and {100} is distinct.
Fracture is uneven.
Hardness is 5 - 5.5
Specific Gravity is approximately 4.28 g/cm3.
Streak is brownish-yellow.
Associated Minerals include many minerals.
Distinguishing Features: Streak.
Origin: Named in 1806 after Johann Wolfgang von Goethe
   (1749-1832), celebrated German poet and scientist.

CLASSIFICATION:

Dana System
# 6.1.1.2

Strunz Classification
# IV/F.06-30

REFERENCES:
MinRec 21:312-313 (1990), Dana 8:268-269 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
--

SS
--

MC
--

HF
¤¤

BR
--

SX
--

FR
--

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