Falkmanite

Formula:   Pb5Sb4S11

Origin of name:   For O. Falkman

 

Crystal system:   Monoclinic

Crystal class:   2/m

Twinning:

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Colour: 

Diaphaneity:

Luster:

Habit:

Hardness:

Specific gravity:

Cleavage:   None

Tenacity: 

Streak: 

 

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Comments:

 

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