Matraite

Formula:  ZnS

Origin of name:  From locality; Matra Mnts., Hungary

 

Crystal system:  Hexagonal

Crystal class:  3m

Twinning: 

Unit cell: 

 

Colour:  Brownish yellow

Diaphaneity:  Transparent

Luster:  Vitreous

Habit:  Crystals pyramidal, intergrown with sphalerite forming sceptre-shaped aggregated

Hardness:  3.5 to 4

Specific gravity

Cleavage:  1; {10-10} distinct

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:  Trimorphous with sphalerite and wurtzite

 

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