AM_Fenaksite_1 Formula: K Na Fe Si4 O10 Name: Fenaksite Unit cell: 8.142 9.954 6.983 100.21 114.13 105.87 , V=469.10 Space group: P-1 (2)

Rozhdestvenskaya I V , Bannova I I , Nikishova L V , Soboleva T V , Doklady Earth Sciences , 398 (2004) p.1029-1033, The crystal structure of fenaksite K2Na2Fe2Si8O20, Locality: synthetic