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Mineralpedia Details for Davyne

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Davyne

Davyne

Formula
(Na,Ca,K)8(Si,Al)12O24(Cl,SO4,CO3)2-3 
Crystal System
Hexagonal 
Crystal Habit
Prismatic, Hexagonal 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, white 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
WebMineral
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Mindat
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Davyne from Bellerberg volcano, Ettringen, Eifel, Rhineland-Palatinate, Germany

Davyne
            from Bellerberg volcano, Ettringen, Eifel, Rhineland-Palatinate, Germany

Tiny white prismatic crystals less than 0.5mm. Davyne is a feldspathoid, silica deficient.

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