General Information:
Chemical Formula:
(Ce,La,Na)5(Si9P)3O32F
Environment:
In vugs in nepheline syenite, marble zenoliths, sodalite syenite zenoliths and pegmatite dikes.
IMA Status:
Approved IMA
Locality:
Mont Saint-Hilare, Rouville County, Quebec, Canada.
Name Origin:
For the relationship to Britholite-Ce.
Physical Properties:
Cleavage:
[001] Distinct
Color:
yellow, tan, colorless, or reddish brown.
Density:
4.66
Diaphaniety:
Opaque to translucent
Habits:
Acicular - Occurs as needle-like crystals., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite),
Hardness:
5 - Apatite
Luminescence:
Non-fluorescent.
Luster:
Adamantine
Streak:
pale brown
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