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399. Afghanite. Crystaline

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Dana number

76.2.5.1

Chemical formula

(Na,Ca,K)₈(Si,Al)₁₂O₂₄(SO₄,Cl,CO₃)₃.H₂O

Crystal class

Hexagonal

Mohs hardness

5.5-6

Specific gravity

2.55-2.65

Collected in

Sar-e-sang, Afghanistan

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