Natrolite is a mineral from the group of zeolites. The crystal habit is columnar or acicular. Natrolite also forms radial-radiant aggregates.
You can see natrolite stone for sale and buy it in the Minerals of Russia online store.
General | |
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Category | Tectosilicate |
Formula (repeating unit) |
Na2Al2Si3O10·2H2O |
IMA symbol | Ntr[1] |
Strunz classification | 9.GA.05 (10 ed) 8/J.21-10 (8 ed) |
Dana classification | 77.01.05.01 |
Crystal system | Orthorhombic |
Crystal class | Pyramidal (mm2) H-M symbol: (mm2) |
Space group | Fdd2 |
Unit cell | a = 18.27, b = 18.587 c = 6.56 [Å], Z = 8 |
Identification | |
Formula mass | 380.22 g/mol |
Color | White, colorless, sometimes pink |
Crystal habit | Acicular |
Twinning | On {110}, {011}, {031} |
Cleavage | Perfect on {110} |
Fracture | Irregular, uneven |
Tenacity | Brittle |
Mohs scale hardness | 5-6 |
Luster | Vitreous, Silky, Pearly |
Streak | White |
Diaphaneity | Transparent to translucent |
Specific gravity | 2.25 |