Aegirine-augite

Ca_0.774Fe_0.11Mg_0.901Na_0.226O₆Si₂

Bertolo, S.Nimis, P.Dal Negro, A.

American Mineralogist (1994) 79, 668-674

a=9.689Å   b=8.824Å   c=5.280Å

α=90°   β=107.60°   γ=90°