AM_Roedderite_1 Formula: K.94 Na1.02 Mg4.75 Fe.12 Mn.1 Ti.01 Si12 O30 Name: Roedderite Unit cell: 10.141 10.141 14.286 90.0 90.0 120.0 , V=1272.34 Space group: P-62C (190)

Armbruster T , European Journal of Mineralogy , 1 (1989) p.715-718, Crystal chemistry of double-ring silicates:, structure of roedderite at 100 and 300 K, T= 300 K