Heyrovskýite

Formula:  Pb10AgBi5S18

Origin of name:  For Jaroslav Heyrovsky, Czech chemist

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Lead-gray

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Crystals flattened, elongated parallel to c-axis

Hardness:  3.5 to 4

Specific gravity:  7.17

Cleavage:  None

Tenacity: 

Streak:  Grayish-black

 

Synonyms/varieties:

 

Comments: 

 

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