Nullaginite

Formula: Ni2(CO3)(OH)2

Origin of name: after locality Nullagine, Western Australia

 

Crystal system: monoclinic

Crystal class: 2 or 2/m

Twinning: 

Unit cell: a = 9.26 Å, b = 12.00 Å, c = 3.09 Å, b = 90.5°

 

Colour: bright green, dark green

Diaphaneity: transparent to translucent

Luster: silky to dull

Habit: cross-fiber veinlets, ovoid to irregular nodules to 2 mm

Hardness: 1.5 - 2

Specific gravity: 3.56

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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