Hawthorneite

Ba_0.85Cr_4.72Fe_3.54K_0.12Mg_0.72O₁₉Ti_3.02

Grey, I. E.Madsen, I. C.Haggerty, S. E.

American Mineralogist (1987) 72, 633-636

a=5.871Å   b=5.871Å   c=23.06Å

α=90°   β=90°   γ=120°