Hammarite

Formula:  Pb2Cu2Bi4S9

Origin of name:  Locality; Gladhammar, Sweden

 

Crystal system:  Orthorhmbic

Crystal class:  2/m 2/m 2/m

Twinning:

Unit cell:

 

Colour:  Steel-gray with red tint

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Crystals short prismatic to acicular, faces curved, no terminal faces

Hardness:  3 to4

Specific gravity:  6.73

Cleavage:  1; {010} poor

Tenacity:

Streak:  Black

 

Synonyms/varieties:

 

Comments:

 

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