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Mineralpedia Details for Eckermannite

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Eckermannite

Eckermannite

Formula
NaNa2(Mg4Al)Si8O22(OH)2 
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
blue green 
Streak
greenish white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
5-6 
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