(Mg1.78 Fe0.22) (Si O4)

Fe_0.22Mg_1.78O₄Si

Litvin, A.L.Semenenko, V.P.Egorova, L.N.Ostapenko, S.S.

Mineralogiceskij Zhurnal (1993) 15, 46-54

a=4.76Å   b=10.224Å   c=5.99Å

α=90°   β=90°   γ=90°