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Willemite crystals - click for larger pic
Wulfenite crystals
Photo by Violet Anderson
© Royal Ontario Museum

Wulfenite crystals - click for larger pic
Wulfenite crystals
© Doug Merson

Wulfenite crystal - click for larger pic
Wulfenite crystal
© Doug Merson

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Home > Mineral Descriptions > Wulfenite - (4 Photos)



Wulfenite
PbMoO4

     Wulfenite is a very rare accessory mineral species at Mont Saint-Hilaire. It is probably due to an alteration of molybdenite.

PHYSICAL CHARACTERISTICS:

Color is usually yellow to pale orange-yellow.
Luster is dull to adamantine.
Diaphaneity is transparent to translucent.
Crystal System is orthorhombic; I41/a.
Crystal Habits include acicular crystals to 2mm and sharp
   tetragonal prisms with very steep pyramidal terminations.
Cleavage {001} is distinct, {001} and {013} are indisctinct.
Fracture is uneven to subconchoidal.
Hardness is 3.
Specific Gravity is approximately 6.8 g/cm3.
Streak is white.
Associated Minerals include hemimorphite, galena and natrolite.
Distinguishing Features: Crystal habit, color and luster.
Origin: Named in 1841 after Franz Xavier Wülfen (1728-1805),
   Austrian Jesuit mineralogist, author of a monograph on the lead ores
   of the discovery locality.

CLASSIFICATION:

Dana System
# 48.1.3.1

Strunz Classification
# VI/G.01-30

REFERENCES:
MinRec 21:347 (1990), Dana 8:999-1000 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
--

SS
--

MC
--

HF
--

BR
¤¤

SX
--

FR
--

Legend

Wulfenite crystal - click for larger pic
Wulfenite crystal
© Doug Merson