General Information: Chemical Formula:Na8Al6Si6O24Cl2
Composition:(Molecular Weight = 933.76 gm)
Sodium 19.70 %
NaAluminum 17.34 %
AlSilicon 18.05 %
SiChlorine 3.80 %
ClOxygen 41.12 %
O Empirical Formula: Na8Al6Si6O24Cl
Locality:Miask in the Ilmen Mountains, Russia.
Name Origin:Named from its chemical composition.
Physical Properties: Cleavage:[110] Poor
Color:azure blue, white, pink, gray, or green.
Density:2.29
Diaphaniety:Transparent to translucent
Habits:Massive - Granular - Common texture observed in granite and other igneous rock., Disseminated - Occurs in small, distinct particles dispersed in matrix.,
Hardness:6 - Orthoclase
Luminescence:None.
Luster:Vitreous - Greasy
Streak:white
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