Kainosite-(Y)
Ca₂(Y,Ce)₂Si₄O₁₂(CO₃) · H₂O

     Kainosite-(Y) is extremely rare at Mont Saint-Hilaire. Only a few specimens have been found from a single find.

PHYSICAL CHARACTERISTICS:

Color varies from pale yellow-brown to brown.
Luster is vitreous.
Diaphaneity is transparent to translucent or opaque.
Crystal System is orthorhombic; Pmnb.
Crystal Habits include divergent sprays of orthorhombic prisms
   to 5mm terminated by pinacoids.
Cleavage at 90 {100} and {010}.
Fracture is uneven.
Hardness is 5 - 6.
Specific Gravity is approximately 3.52 g/cm³.
Streak is pale brown.
Associated Minerals include aegirine, albite, amphibole group,
   ancylite, calcite, catapleiite, donnayite, fluorapatite,
   nenadkevichite, pyrophanite, synchysite and titanite.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1886 probably from a mispronunciation of the
   Greek xenos, strange, in allusion to its composition, which
   combines silicate and carbonate radicals.

CLASSIFICATION:

REFERENCES:
MinRec 21:315 (1990), Dana 8:1236-1237 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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