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

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

Molybdenite crystals - click for larger pic
Spherical aggregate of
1mm in sodalite
© Dr. Jaszczak

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Home > Mineral Descriptions > Molybdenite - (6 Photos)



Molybdenite
MoS2

     Interesting habits of molybdenite have been found at MSH; spherical aggregates as represented here and hollow tubes that were described in the first edition of the Mineralogical Record by R. Bideaux.

     Both molybdenite polytypes (-2H -3R) are common at Mont Saint- Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually lead gray.
Luster is metallic.
Diaphaneity is opaque.
Crystal System is hexagonal; P63mmc (-2H) and R3m (-3R).
Crystal Habits include sharp hexagonal, thin-foil plates forming
   attractive rosettes or spherical aggregates, embedded masses
   and hollow, cylindrical tubes to 5mm and 0.2mm in diameter.
Cleavage {001} is perfect.
Fracture is not apparent.
Hardness is 1 - 1.5
Specific Gravity is approximately 4.7 g/cm3.
Streak is greenish.
Associated Minerals include aegirine, albite, amphibole group,
   andradite, apophyllite series, calcite, natrolite, pectolite, pyrite,
   titanite, vesuvianite and zircon.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1807 from the Greek molybdos, lead, as a result
   of early confusion between lead, graphite, and molybdenum disulfide,
   as the composition of the mineral.

CLASSIFICATION:

Dana System
# 2.12.10.1

Strunz Classification
# II/D.25-10

REFERENCES:
MinRec 1:105-112 (1970),MinRec 21:323 (1990), Dana 8:132-134 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
¤¤

AP
¤¤

MX
¤¤

SS
¤¤

MC
¤¤

HF
¤¤

BR
¤¤

SX
¤¤

FR
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Legend

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

Molybdenite crystals - click for larger pic
Molybdenite crystals
© Steven Stuart

Molybdenite crystals - click for larger pic
Molybdenite crystals
© Stephan Wolfsried