Lawrencite

Formula:  (Fe,Ni)Cl2

Origin of name:  For J. Lawrence Smith, American chemist

 

Crystal system:  Hexagonal

Crystal class:  -3 2/m

Twinning: 

Unit cell: 

 

Colour:  Green to brown

Diaphaneity: 

Luster: 

Habit:  Massive

Hardness:  1

Specific gravity:  1; {0001} perfect (inferred from crystal structure)

Cleavage: 

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:  From meteorites

 

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