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Rosenbuschite
(Ca,Na)3(Zr,Ti,Nb)Si2O8F

     Rosenbuschite is an extremely rare accessory mineral at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually pale yellow to beige.
Luster is vitreous.
Diaphaneity is translucent to opaque.
Crystal System is triclinic; P1.
Crystal Habits include acicular crystals to 3mm forming divergent sprays.
Cleavage {010} is perfect (not readily apparent).
Fracture is uneven.
Hardness is 5 - 6.
Specific Gravity is approximately 3.3 g/cm3.
Streak is white.
Associated Minerals include aegirine, analcime, burbankite, calcite,
   natrolite, paranatrolite, wöhlerite and zircon.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1887 for Karl Harry F. Rosenbusch (1836-1914),
   German professor of mineralogy.

CLASSIFICATION:

Dana System
# 56.2.4.8

Strunz Classification
# VIII/C.13-10

REFERENCES:
MinRec 21:333 (1990), Dana 8:1165 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
¤¤

HF
--

BR
--

SX
--

FR
--

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