Motukoreaite

Formula:  Na₂Mg₃₈Al₂₄(CO₃)₁₃(SO₄)₈(OH)₁₀₈ ^. 56H₂O

Origin of name:  From Maori motukorea - island of cormorants New Zealand

Crystal system:  Hexagonal

Crystal class:  -3 2/m

Twinning: 

Unit cell: a = 9.34 Ǻ, c = 44.72 Ǻ

Colour:  Colourless, white

Diaphaneity: 

Luster: 

Habit:  Plate-like hexagonal crystals 150 x 12 μm forming radiating, fibrous or crystalline rims to 60 μm thick coating veinlets

Hardness:  1 to 1.5

Specific gravity:  1.48 to 1.54

Cleavage:  None

Tenacity: 

Streak: 

Synonyms/varieties:

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