Beudantite
PbFe₃(AsO₄)(SO₄)(OH)₆

     Beudantite is an extremely rare accessory mineral at Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color varies from yellow-green to olive-green, and brown to
   orange-brown.
Luster is greasy.
Diaphaneity is translucent.
Crystal System is hexagonal; R3m.
Crystal Habits include crusts and druses of tiny crystals.
Cleavage {001} is perfect.
Fracture was not observed.
Hardness is 4.
Specific Gravity is approximately 4.49 g/cm³.
Streak is greenish.
Associated Minerals include aegirine, anglesite, arsenopyrite, galena,
   gonnardite, hemimorphite, microcline, mimetite, muscovite, natrolite,
   pyrite, pyrrhotite and sphalerite.
Distinguishing Features: Crystal habit.
Origin: Named in 1826 for Francois Sulpice Beudant (1787-1850),
   French mineralogist and physicist.

CLASSIFICATION:

REFERENCES:
Minrec 21:299 (1990), Dana 8:961 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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