Tritomite-(Ce)

tritomite-(Ce)

leucophanite

mosandrite-(Ce)

catapleiite

Images

Formula: Ce₅(SiO₄,BO₄)₃(OH,O)
Nesosilicate (insular SiO₄ groups), britholite group, apatite supergroup
Crystal System: Amorphous
Specific gravity: 4.15 to 4.25 measured
Hardness: 5½ to 6
Streak: Yellowish grey
Colour: Dark red-brown, amber, black
Solubility: Gelatinises in hydrochloric acid
RADIOACTIVE
Environments:

Pegmatites

Tritomite-(Ce) is a rare mineral occurring in nepheline syenite pegmatites (Webmin)

Localities

At the Cardiff property, Cardiff Township, Haliburton County, Ontario, Canada, tritomite-(Ce) is associated with augite, plagioclase, microcline, allanite, calcite, fluorite and quartz (HOM).

At the type locality, Låven, Langesundsfjorden, Larvik, Vestfold, Norway, tritomite-(Ce) occurs in nepheline syenite pegmatites (HOM, Dana) associated with aegirine, leucophanite, analcime, mosandrite-(Ce) and catapleiite (HOM Mindat).

Tritomite-(Ce) from Langesundsfjorden - Image

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