Lévyclaudite

Formula:  Pb8Sn7Cu3(Bi,Sb)3S28

Origin of name:  For Claude Lévy, French mineralogist

 

Crystal system:  Monoclinic

Crystal class:  2

Twinning: 

Unit cell: 

 

Colour:  Gray

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Platy lamellae to 300 µm forming veinlets < 1 mm wide

Hardness:  2.5 to 3

Specific gravity

Cleavage:  1; {100} very good

Tenacity: 

Streak:  Black

 

Synonyms/varieties:

 

Comments:  Isomorphous with cylindrite

 

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