Västmanlandite-(Ce)

vastmanlandite-(Ce)

fluorbritholite

tremolite

dollaseite

Images

Formula: Ce₃CaMg₂Al₂Si₅O₁₉(OH)₂F
Sorosilicate (Si₂O₇ groups), västmanlandite group
Crystal System: Monoclinic
Specific gravity: 4.51 calculated
Hardness: 6
Streak: Yellowish grey
Colour: Dark brown
Common impurities: REE,Fe,Ti,P
Weakly RADIOACTIVE
Environments

Metamorphic envronments

Localities

At the type locality, the Malmkärra mine, Norberg, Västmanland County, Sweden, västmanlandite-(Ce) occurs in the skarn deposits as grains 0.2 to 3 mm across, in association with fluorbritholite-(Ce), tremolite, serpentine, magnetite, dollaseite-(Ce) and dolomite (EJM 17.1.129–141).
The mine is an abandoned iron mine, consisting of disseminated magnetite-amphibole skarn replacements in marble (Webmin).

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