Mineral - Gmelinite-(Na)
Gmelinite-(Na)
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Na₄(Si₈Al₄O₂₄] · 11H₂O
Unit Cell
Physical Properties
Hardness
4.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
orangeyellowcolorless
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
hexagonal
Point Group
Space Group
Habit
pyramidal, Rhombohedron
Formation
hydrothermal, Magmatisch
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Gmelinite-(Na)