Analcime
Na(AlSi₂)O₆ · H₂O

     Analcime occurs very abundantly at MSH in several environments. Some of the largest and perhaps the best specimens for the species have been found at Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually colorless on smaller crystals and white or gray on
   the larger crystals.
Luster is vitreous.
Diaphaneity is transparent on smaller crystals and translucent to
   opaque on larger crystals.
Crystal System is isometric with several space groups.
Crystal Habits include excellent trapezohedra to 25cm, distorted
   trapezohedra and as large pseudomorphs to 15cm, consisting
   of crystalline masses of small crystals of analcime.
Cleavage: {001} is poor.
Fracture is subconchoidal.
Hardness is 5 - 5.5
Specific Gravity is approximately 2.25 g/cm³.
Streak is white.
Associated Minerals include a wide variety of associated minerals
   due to its widespread occurrence.
Distinguishing Features: Crystal habit and forms.
Origin: Named in 1801 from the Greek analkis, weak, alluding to the
   weak electrostatic charge that develops when it is heated or rubbed.

CLASSIFICATION:

REFERENCES:
MinRec 21:294-295 (1990), Dana 8:1646-1648 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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