AM_Shirokshinite Formula: K.9 Na.941 Mg1.971 Fe.09 Mn.01 Ti.01 (Si3.98 Al.02) O10 F2 Name: Shirokshinite Unit cell: 5.269 9.092 10.197 90.0 100.12 90.0 , V=480.89 Space group: C12/M1 (12)

Pekov I V , Chukanov N V , Ferraris G , Ivaldi G , Pushcharovsky D Y , Zadov A E , European Journal of Mineralogy , 15 (2003) p.447-454, Shirokshinite, K(NaMg2)Si4O10F2, a new mica with octahedral Na from Khidiny massif,, Kola Peninsula: descriptive data and structural disorder, Locality: Khidiny massif, Kola Peninsula, Russia