AM_Sheldrickite Formula: Na Ca3 C2 O7 F3 Name: Sheldrickite Unit cell: 6.726 6.726 15.044 90.0 90.0 120.0 , V=589.40 Space group: P1132 (1)

Grice J D , Gault R A , Van Velthuizen J , The Canadian Mineralogist , 35 (1997) p.181-187, Sheldrickite, a new sodium-calcium-fluorocarbonate mineral, species from Mont Saint-Hilaire, Quebec, Locality: Mont Saint-Hilaire, Quebec, Canada