Chegemite

Ca₇F_0.24H_1.76O_13.76Si₃

Galuskin, E. V.Gazeev, V. M.Lazic, B.Armbruster, T.Galuskina, I. O.Zadov, A. E.Pertsev, N. N.Wrzalik, R.Dzierzanowski, P.Gurbanov, A. G.Bzowska, G.

European Journal of Mineralogy (2009) 21, 1045-1059

a=5.0696Å   b=11.3955Å   c=23.5571Å

α=90°   β=90°   γ=90°