AM_Weberite Formula: Na2 Mg Al F7 Name: Weberite Unit cell: 7.06 10.0 7.303 90.0 90.0 90.0 , V=515.59 Space group: IMMA (74)

Giuseppetti G , Tadini C , Tschermaks Mineralogische und Petrographische Mitteilungen , 25 (1978) p.57-62, Re-examination of the crystal structure of weberite, Locality: Ivigtut, Greenland