AM_Zwieselite Formula: Fe2 P O4 F Name: Zwieselite Unit cell: 11.999 9.89 6.489 90.0 90.0 107.72 , V=733.52 Space group: I112/A (15)

Yakubovich O V , Simonov M A , Matvienko E N , Belov N V , Doklady Akademii Nauk SSSR , 238 (1978) p.576-579, The crystal structure of the synthetic finite Fe-term of the series triplite -, zwieselite Fe2(PO4)F