AM_Erdite Formula: Na Fe S2 (O2 H2) Name: Erdite Unit cell: 10.693 9.115 5.507 90.0 92.17 90.0 , V=536.36 Space group: C12/C1 (15)

Konnert J A , Evans H T , American Mineralogist , 65 (1980) p.516-521, The crystal structure of erdite, NaFeS2*2H2O