Manganokukisvumite (Type Locality)
Na₆MnTi₄Si₈O₂₈ · 4H₂O

     Manganokukisvumite, is the manganese analogue of kukisvumite. It was discovered in 1987 by Jerry van Velthuizen in albite-rich syenite breccia.

PHYSICAL CHARACTERISTICS:

Color is colourless.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is orthorhombic, Pccn.
Crystal Habits include extremely thin, flattened and sword-shaped
   to 0.5mm in length, frequently forming rosette-like radiating groups.
Cleavage none apparent.
Fracture is splintery.
Hardness is ~ 5.5 - 6.
Specific Gravity is ~ 2.86 g/cm³.
Streak is white.
Associated Minerals include aegirine, albite, annite, calcite, chalcopyrite,
   chlorite-group mineral, elpidite, fluorapatite, labuntsovite, magnetite,
   natrolite, pyrite, pyrrhotite and sodalite.
Distinguishing Features: Brittle.
Origin: Named in 2004 to reflect its composition; the manganese
   analogue of kukisvumite.

CLASSIFICATION:

REFERENCES:
CanMin 42:0781-0785 (2004)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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