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Formula: (Ce,REE,Ca)9(Al,Fe3+)(SiO4)3[SiO3(OH)]4(OH)3
Nesosilicate (insular SiO4 groups), cerite group
Crystal System: Trigonal
Specific gravity: 4.675 calculated
Hardness: 5
Streak: White
Colour: Pale pink to reddish pink
Weakly RADIOACTIVE
Environments
Plutonic igneous environments
Pegmatites
Localities
There are two co-type Localities, Scala dei Ratti Quarry, Feriolo, and the Seula mine, Mount Camoscio, Oltrefiume,
both at Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy.
At the Ratti quarry aluminocerite-(Ce) occurs in millimeter-sized
secondary
cavities hosted in
aplite-pegmatite
veins and pods within granite. At the Seula mine it occurs in
centimeter-sized cavities in granite
(AM 94.487-493).
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