General Information:
Chemical Formula:Na2[Al2Si3O10]·2(H2O)
Composition:(Molecular Weight = 380.22 gm)Sodium 12.09 %
NaAluminum 14.19 %
AlSilicon 22.16 %
SiHydrogen 1.06 %
H Oxygen 50.49 %
O Empirical Formula: Na2Al2Si3O10·2(H2O)
Environment:Occurs in the cavities of amygdaloidal basalts and other related rocks.
IMA Status:Approved IMA
Locality:Bohemia of Czechoslovakia.
Name Origin:From the Greek natron, "soda," in allusion to sodium content and lithos - "stone."
Physical Properties: Cleavage:[110] Perfect, [010] Imperfect
Color:white, colorless, red, yellowish white, or reddish white.
Density:2.25
Diaphaniety:Transparent to translucent
Habits:Acicular - Occurs as needle-like crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Nodular - Tuberose forms having irregular protuberances over the surfac e.
Hardness:5.5-6 - Knife Blade-Orthoclase
Luminescence:None.
Luster:Vitreous - Silky
Streak:white
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