Erionite | |
Chemical Formula |
(Na2,K2,Ca)2Al4Si14O36·15H2O |
Species |
Silicates |
Crystal System |
Hexagonal |
Mohs Scale |
3-4 |
Specific Gravity |
2.09-2.13 |
Color |
White, Green, Gray, Orange |
Streak |
white |
Luster |
Silky |
Refractive Index |
n = 1.458 - 1.468 n = 1.458 - 1.480 |
Diaphaneity |
Transparent, Translucent |
Cleavage |
Distinct |
Fracture |
Splintery |
Crystal Habit:Acicular - Occurs as needle-like crystals. |