Edingtonite
(Ba,Ca)Al₂Si₃O₁₀ · H₂O

     Edingtonite, a member of the zeolite, is relatively rare at Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually colorless.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is orthorhombic; P2₁2₁2₁.
Crystal Habits include small hollow tetragonal prisms with fibrous
   terminations.
Cleavage {110} is perfect.
Fracture is uneven.
Hardness is 4.
Specific Gravity is approximately 2.83 g/cm³.
Streak is white.
Associated Minerals include aegirine, analcime, calcite, ilmenite
   and natrolite.
Distinguishing Features: Crystal habit.
Origin: Named in 1825 for James Edington (1787-1844), Glasgow,
   Scotland, who found the first specimens.

CLASSIFICATION:

REFERENCES:
MinRec 21:306 (1990), Dana 8:1683-1685 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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