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Kapustinite
Na5.5Mn0.25ZrSi6O16(OH)2

     Kapustinite was revealed by recent investigations by Dr. Igor Pekov of Moscow State University in material from sodalite xenoliths from MSH. It is a member of the cancrinite group. It has been identified from material as early as 1984 and up to 1991. It is a member of the lovozerite group.

     This species was collected at mont Saint-Hilaire before it was described as a new species.

PHYSICAL CHARACTERISTICS:

Color is usually cherry red.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is hexagonal; C2m.
Crystal Habits include irregular grains as cores of litvinskite crystals.
Cleavage none apparent.
Fracture is conchoidal.
Hardness is 6.
Specific Gravity is approximately 2.78 g/cm3.
Streak is pale lilac.
Associated Minerals include aegirine, cancrisilite, eudialytes,
   kentbrooksite, litvinskite, lovozerites, molybdenite, pectolite,
   sphalerite, steenstrupine, thermonatrite and villiaumite.
Distinguishing Features: Crystal habit.
Origin: Named in 2003 after Yu. L. Kapustin (1933-2002), Russian
   mineralogist who extensively studied alkaline massifs. It was
   originally accepted as IMA 2003-018.

CLASSIFICATION:

Dana System
# 61.1.2a.6

Strunz Classification
# VIII/E.16-23

REFERENCES:
ZVMO 113:1-14 (2003)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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