Petersenite-(Ce)

C₅Ce₂Na₄O₁₅

Grice, J. D.Velthuizen, J. V.Gault, R. A.

The Canadian Mineralogist (1994) 32, 405-414

a=20.872Å   b=6.367Å   c=10.601Å

α=90°   β=120.50°   γ=90°