AM_Fenaksite Formula: K Na Fe Si4 O10 Name: Fenaksite Unit cell: 6.98 8.24 9.98 114.2 80.23 115.6 , V=472.14 Space group: P-1 (2)

Golovachev V P , Drozdov Y N , Kuz min E A , Belov N V , Soviet Physics Doklady , 15 (1971) p.902-904, The crystal structure of phenaxite FeNaK(Si4O10)(KNaFe[Si4O10]), Locality: Khibiny massif, Kola Peninsula, Russia