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Rasvumite crystals - click for larger pic
Rasvumite crystals
© Gilles Haineault

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

Rasvumite crystals - click for larger pic
Rasvumite crystals
© Gilles Haineault

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Home > Mineral Descriptions > Rasvumite - (3 Photos)



Rasvumite
KFe2S3

     Rasvumite is extremely rare at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually dark brown to black.
Luster is dull to vitreous.
Diaphaneity is translucent to opaque.
Crystal System is orthorhombic; Cmcm.
Crystal Habits include massive crusts coating other minerals.
Cleavage {110} is perfect.
Fracture is (??).
Hardness is 4.5
Specific Gravity is approximately 3.1 g/cm3.
Streak is black.
Associated Minerals include sidorenkite, sodalite, ussingite and
   villiaumite.
Distinguishing Features: Crystal habit.
Origin: Named in 1970 after its discovery locality near Mount
   Rasvumchorr, Russia.

CLASSIFICATION:

Dana System
# 2.9.11.1

Strunz Classification
# II/F.07-10

REFERENCES:
MinRec 21:331 (1990), Dana 8:95 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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