Plumboferrite

Fe₁₁O_18.19Pb₂

Holtstam, D.Norrestam, R.Sjodin, A.

American Mineralogist (1995) 80, 1065-1072

a=5.9356Å   b=5.9356Å   c=23.576Å

α=90°   β=90°   γ=120°