Seidozerite

Ca_0.55F₂Mn_0.85Na_3.2O₁₆Si₄Ti_1.15Zr_1.85

Pushcharovskii D YuPasero, M.Merlino, S.Vladykin, N. V.Zubkova, N. V.Gobechiya, E. R.

Crystallography Reports (2002) 47, 196-200

a=5.627Å   b=7.134Å   c=18.590Å

α=90°   β=102.68°   γ=90°