Tennantite
(Cu,Fe)₁₂As₄S₁₃

     Tennantite is another rare species from MSH.

PHYSICAL CHARACTERISTICS:

Color is usually black.
Luster is metallic.
Diaphaneity is opaque.
Crystal System is isometric, I43m.
Crystal Habits include tiny, very fine grained masses.
Cleavage {110} perfect and {010} imperfect.
Fracture is subconchoidal to uneven.
Hardness is 4.
Specific Gravity is approximately 4.6 g/cm³.
Streak is black.
Associated Minerals include villiaumite.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1819 after Smithson Tennant (1761-1815), English
   chemist.

CLASSIFICATION:

REFERENCES:
Dana 8:164 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

Legend