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Dominant species
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Mordenite
Chemical
Formula
Ca,Na2,K2Al2Si10O24·7H2O
Species
Silicates
Crystal
System
Orthorhombic
Mohs
Scale
3-4
Specific
Gravity
2.125
Color
Colourless, white, yellowish, pinkish
Streak
White
Luster
Vitreous, Silky
Refractive
Index
n = 1.472 - 1.483 n = 1.475 - 1.485 n = 1.477 - 1.487
Diaphaneity
Transparent, Translucent
Cleavage
Perfectperfect on distinct on
Fracture
Irregular/Uneven
Crystal Habit:Prismatic crystals, acicular to fine fibrous, radiating groups, cottony aggregates, compact, porcelaneous.
Geological Setting:Veins and amygdaloids in igneous rocks.
Mordenite5047
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Mordenite5035
Mordenite5035