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

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

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Home > Mineral Descriptions > Arsenopyrite - (2 Photos)



Arsenopyrite
FeAsS

     Arsenopyrite is a relatively rare mineral at MSH

PHYSICAL CHARACTERISTICS:

Color is usually silver-white.
Luster is metallic.
Diaphaneity is opaque.
Crystal System is monoclinic; P21/c.
Crystal Habits include the very sharp wedge-shaped crystals to
    3mm and short prismatic crystals; crystalline masses.
Cleavage {001} is distinct.
Fracture is uneven.
Hardness is 5.5 - 6.
Specific Gravity is approximately 6.2 g/cm3.
Streak is black.
Associated Minerals include albite, amphibole group, apophyllite series,
   berthierine, biotite, calcite, epidote, fluorapatite, fluorite, gaidonnayite,
   galena, garnet group, molybdenite, pectolite, pyrite, pyrrhotite, rutile,
   siderite, sphalerite, titanite, vesuvianite and zircon.
Distinguishing Features: Crystal habit, color and luster.
Origin: Named in 1847 for its composition, a contraction of the
   older term arsenical pyrites.

CLASSIFICATION:

Dana System
# 2.12.4.1

Strunz Classification
# II/D.22-10

REFERENCES:
MinRec 21:296 (1990), Dana 8:129 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
¤¤

SS
--

MC
¤¤

HF
--

BR
¤¤

SX
¤¤

FR
--

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