Aenigmatite

Fe_0.65Mg_2.163NaO₁₀Si_3.188

Gasparik, T.Parise, J. B.Reeder, R. J.Young, V. G.Wilford, W. S.

American Mineralogist (1999) 84, 257-266

a=10.328Å   b=10.724Å   c=8.805Å

α=105.15°   β=96.85°   γ=125.47°