Osumilite

Al_2.901Fe_0.113K_0.811Mg_1.986Na_0.052O₃₀Si₁₂

Balassone, G.Mormone, A.Rossi, M.Bernardi, A.Fisch, M.Armbruster, T.Malsy, K.Berger, A.

European Journal of Mineralogy (2008) 20, 713-720

a=10.0946Å   b=10.0946Å   c=14.3311Å

α=90°   β=90°   γ=120°