Manganotychite
Na₆(Mn,Fe,Mg)₂(CO₃)₄(SO₄)

     Manganotychite is another rare species from MSH.

PHYSICAL CHARACTERISTICS:

Color is usually pale pink.
Luster is vitreous.
Diaphaneity is transparent to translucent.
Crystal System is isometric; Fd3.
Crystal Habits include blocky crystals.
Cleavage none.
Fracture is conchoidal.
Hardness is 4.
Specific Gravity is approximately 2.7 g/cm³.
Streak is white.
Associated Minerals include analcime, catapleiite, petersenite,
   shortite and trona.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1990 to reflect its composition: the manganian
   analog of tychite and ferrotychite.

CLASSIFICATION:

REFERENCES:
Dana 8:519-520 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

Legend