AM_Potassic-ferri-ferrorichterite_2 Formula: K (Ca.52 Na1.48) Fe5 Si8 O24 H2 Name: Potassic-ferri-ferrorichterite Unit cell: 10.1361 18.1648 5.303 90.0 104.327 90.0 , V=946.02 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: Ri15, T = 298 K