AM_Potassic-ferri-ferrorichterite Formula: K Ca.55 Na1.39 Fe5.06 Si8 O24 H2 Name: Potassic-ferri-ferrorichterite Unit cell: 10.1448 18.1841 5.2962 90.0 104.415 90.0 , V=946.25 Space group: C12/M1 (12)

Redhammer G J , Roth G , European Journal of Mineralogy , 14 (2002) p.105-114, Crystal structure and Mossbauer spectroscopy of the synthetic amphibole, potassic-ferri-ferrorichterite at 298 K and low temperatures (80-110 K), Sample: Ri1, T = 298 K