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362. Cookeite. Crystaline

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Dana number

71.4.1.2

Chemical formula

Al₂[LiAl₂³⁺][Si₃AlO₁₀](OH)₈

Crystal class

Monoclinic

Mohs hardness

2.5-3.5

Specific gravity

2.58-2.69

Collected in

Manitoba , Canada

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