AM_Nacaphite Formula: (Na10 Ca5) P5 O20 F5 Name: Nacaphite Unit cell: 7.0179 7.0179 40.56 90.0 90.0 120.0 , V=1729.99 Space group: R3M (160)

Sokolova E V , Kabalov Y K , Ferraris G , Schneider J , Khomyakov A P , The Canadian Mineralogist , 37 (1999) p.83-90, Modular approach in solving the crystal structure of a synthetic dimorph of, nacaphite, Na2Ca[PO4]F, from powder-diffraction data