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Synchysite-(Ce) crystals - click for larger pic
Synchysite-(Ce) crystals
Photo by Violet Anderson
© Royal Ontario Museum

Synchysite-(Ce) crystals - click for larger pic
Synchysite-(Ce) crystals
© Doug Merson

Synchysite-(Ce) crystals - click for larger pic
Synchysite-(Ce) crystals
© Doug Merson

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Home > Mineral Descriptions > Synchysite-(Ce) - (3 Photos)



Synchysite-(Ce)
Na2Al2Si3O10 · 2H2O

     Synchysite-(Ce) is rare at MSH. Two polytypes, -12T and -24T have been reported from the locality.

PHYSICAL CHARACTERISTICS:

Color varies from tan to beige, pale green, yellow and brown.
Luster is dull to vitreous; resinous on broken surfaces.
Diaphaneity is opaque to translucent.
Crystal System is monoclinic; C2/c.
Crystal Habits include tabular crystals to 4mm, thin hexagonal plates
   forming spherical aggregates and rosettes.
Cleavage {001} is fair.
Fracture is subconchoidal to splintery.
Hardness is 4 - 4.5.
Specific Gravity is approximately 3.9 g/cm3.
Streak is light yellowish-white.
Associated Minerals include albite, analcime, bastnäsite, biotite,
   calcite, catapleiite, fluorite, microcline, pyrite, pyrochlore, pyrrhotite,
   rutile, siderite, sphalerite and zircon.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1901 from the Greek synchys, confounding,
   alluding to its original misidentification as parisite-(Ce).

CLASSIFICATION:

Dana System
# 16a.1.3.1

Strunz Classification
# V/C.07-110

REFERENCES:
MinRec 21:341 (1990), Dana 8:479 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
--

SS
--

MC
¤¤

HF
--

BR
¤¤

SX
--

FR
--

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